diff --git a/openedx/core/djangoapps/content/search/handlers.py b/openedx/core/djangoapps/content/search/handlers.py
index 835810879780..7b008b7a454e 100644
--- a/openedx/core/djangoapps/content/search/handlers.py
+++ b/openedx/core/djangoapps/content/search/handlers.py
@@ -6,7 +6,14 @@
 
 from django.db.models.signals import post_delete
 from django.dispatch import receiver
-from openedx_events.content_authoring.data import ContentLibraryData, ContentObjectData, LibraryBlockData, XBlockData
+from openedx_events.content_authoring.data import (
+    ContentLibraryData,
+    ContentObjectChangedData,
+    LibraryBlockData,
+    XBlockData,
+)
+from opaque_keys import InvalidKeyError
+from opaque_keys.edx.keys import UsageKey
 from openedx_events.content_authoring.signals import (
     CONTENT_LIBRARY_DELETED,
     CONTENT_LIBRARY_UPDATED,
@@ -16,9 +23,8 @@
     XBLOCK_CREATED,
     XBLOCK_DELETED,
     XBLOCK_UPDATED,
-    CONTENT_OBJECT_TAGS_CHANGED,
+    CONTENT_OBJECT_ASSOCIATIONS_CHANGED,
 )
-from openedx.core.djangoapps.content_tagging.utils import get_content_key_from_string
 
 from openedx.core.djangoapps.content.course_overviews.models import CourseOverview
 from openedx.core.djangoapps.content.search.models import SearchAccess
@@ -139,22 +145,22 @@ def content_library_updated_handler(**kwargs) -> None:
     update_content_library_index_docs.delay(str(content_library_data.library_key))
 
 
-@receiver(CONTENT_OBJECT_TAGS_CHANGED)
+@receiver(CONTENT_OBJECT_ASSOCIATIONS_CHANGED)
 @only_if_meilisearch_enabled
-def content_object_tags_changed_handler(**kwargs) -> None:
+def content_object_associations_changed_handler(**kwargs) -> None:
     """
-    Update the tags data in the index for the Content Object
+    Update the collections/tags data in the index for the Content Object
     """
-    content_object_tags = kwargs.get("content_object", None)
-    if not content_object_tags or not isinstance(content_object_tags, ContentObjectData):
+    content_object = kwargs.get("content_object", None)
+    if not content_object or not isinstance(content_object, ContentObjectChangedData):
         log.error("Received null or incorrect data for event")
         return
 
     try:
         # Check if valid if course or library block
-        content_key = get_content_key_from_string(str(content_object_tags.object_id))
-    except ValueError:
+        usage_key = UsageKey.from_string(str(content_object.object_id))
+    except InvalidKeyError:
         log.error("Received invalid content object id")
         return
 
-    upsert_block_tags_index_docs(content_key)
+    upsert_block_tags_index_docs(usage_key)
diff --git a/openedx/core/djangoapps/content_libraries/api.py b/openedx/core/djangoapps/content_libraries/api.py
index 2253514ee0f9..649aaa5b3287 100644
--- a/openedx/core/djangoapps/content_libraries/api.py
+++ b/openedx/core/djangoapps/content_libraries/api.py
@@ -78,12 +78,12 @@
 from opaque_keys import InvalidKeyError
 from openedx_events.content_authoring.data import (
     ContentLibraryData,
-    ContentObjectData,
+    ContentObjectChangedData,
     LibraryBlockData,
     LibraryCollectionData,
 )
 from openedx_events.content_authoring.signals import (
-    CONTENT_OBJECT_TAGS_CHANGED,
+    CONTENT_OBJECT_ASSOCIATIONS_CHANGED,
     CONTENT_LIBRARY_CREATED,
     CONTENT_LIBRARY_DELETED,
     CONTENT_LIBRARY_UPDATED,
@@ -1228,10 +1228,13 @@ def update_library_collection_components(
         )
     )
 
-    # Emit a CONTENT_OBJECT_TAGS_CHANGED event for each of the objects added/removed
+    # Emit a CONTENT_OBJECT_ASSOCIATIONS_CHANGED event for each of the objects added/removed
     for usage_key in usage_keys:
-        CONTENT_OBJECT_TAGS_CHANGED.send_event(
-            content_object=ContentObjectData(object_id=usage_key),
+        CONTENT_OBJECT_ASSOCIATIONS_CHANGED.send_event(
+            content_object=ContentObjectChangedData(
+                object_id=str(usage_key),
+                changes=["collections"],
+            ),
         )
 
     return collection
diff --git a/openedx/core/djangoapps/content_libraries/tests/test_api.py b/openedx/core/djangoapps/content_libraries/tests/test_api.py
index b7b646acac56..46015a50d750 100644
--- a/openedx/core/djangoapps/content_libraries/tests/test_api.py
+++ b/openedx/core/djangoapps/content_libraries/tests/test_api.py
@@ -14,11 +14,11 @@
 )
 from opaque_keys.edx.locator import LibraryLocatorV2
 from openedx_events.content_authoring.data import (
-    ContentObjectData,
+    ContentObjectChangedData,
     LibraryCollectionData,
 )
 from openedx_events.content_authoring.signals import (
-    CONTENT_OBJECT_TAGS_CHANGED,
+    CONTENT_OBJECT_ASSOCIATIONS_CHANGED,
     LIBRARY_COLLECTION_CREATED,
     LIBRARY_COLLECTION_UPDATED,
 )
@@ -262,7 +262,7 @@ class ContentLibraryCollectionsTest(ContentLibrariesRestApiTest, OpenEdxEventsTe
     Same guidelines as ContentLibrariesTestCase.
     """
     ENABLED_OPENEDX_EVENTS = [
-        CONTENT_OBJECT_TAGS_CHANGED.event_type,
+        CONTENT_OBJECT_ASSOCIATIONS_CHANGED.event_type,
         LIBRARY_COLLECTION_CREATED.event_type,
         LIBRARY_COLLECTION_UPDATED.event_type,
     ]
@@ -411,10 +411,10 @@ def test_update_library_collection_components(self):
 
     def test_update_library_collection_components_event(self):
         """
-        Check that a CONTENT_OBJECT_TAGS_CHANGED event is raised for each added/removed component.
+        Check that a CONTENT_OBJECT_ASSOCIATIONS_CHANGED event is raised for each added/removed component.
         """
         event_receiver = mock.Mock()
-        CONTENT_OBJECT_TAGS_CHANGED.connect(event_receiver)
+        CONTENT_OBJECT_ASSOCIATIONS_CHANGED.connect(event_receiver)
         LIBRARY_COLLECTION_UPDATED.connect(event_receiver)
 
         api.update_library_collection_components(
@@ -440,20 +440,22 @@ def test_update_library_collection_components_event(self):
         )
         self.assertDictContainsSubset(
             {
-                "signal": CONTENT_OBJECT_TAGS_CHANGED,
+                "signal": CONTENT_OBJECT_ASSOCIATIONS_CHANGED,
                 "sender": None,
-                "content_object": ContentObjectData(
+                "content_object": ContentObjectChangedData(
                     object_id=UsageKey.from_string(self.lib1_problem_block["id"]),
+                    changes=["collections"],
                 ),
             },
             event_receiver.call_args_list[1].kwargs,
         )
         self.assertDictContainsSubset(
             {
-                "signal": CONTENT_OBJECT_TAGS_CHANGED,
+                "signal": CONTENT_OBJECT_ASSOCIATIONS_CHANGED,
                 "sender": None,
-                "content_object": ContentObjectData(
+                "content_object": ContentObjectChangedData(
                     object_id=UsageKey.from_string(self.lib1_html_block["id"]),
+                    changes=["collections"],
                 ),
             },
             event_receiver.call_args_list[2].kwargs,
diff --git a/openedx/core/djangoapps/content_tagging/api.py b/openedx/core/djangoapps/content_tagging/api.py
index 47b157c1a34e..80de81958abc 100644
--- a/openedx/core/djangoapps/content_tagging/api.py
+++ b/openedx/core/djangoapps/content_tagging/api.py
@@ -18,8 +18,8 @@
 from openedx_tagging.core.tagging.models.utils import TAGS_CSV_SEPARATOR
 from organizations.models import Organization
 from .helpers.objecttag_export_helpers import build_object_tree_with_objecttags, iterate_with_level
-from openedx_events.content_authoring.data import ContentObjectData
-from openedx_events.content_authoring.signals import CONTENT_OBJECT_TAGS_CHANGED
+from openedx_events.content_authoring.data import ContentObjectChangedData
+from openedx_events.content_authoring.signals import CONTENT_OBJECT_ASSOCIATIONS_CHANGED
 
 from .models import TaxonomyOrg
 from .types import ContentKey, TagValuesByObjectIdDict, TagValuesByTaxonomyIdDict, TaxonomyDict
@@ -301,9 +301,12 @@ def set_exported_object_tags(
             create_invalid=True,
             taxonomy_export_id=str(taxonomy_export_id),
         )
-        CONTENT_OBJECT_TAGS_CHANGED.send_event(
+        CONTENT_OBJECT_ASSOCIATIONS_CHANGED.send_event(
             time=now(),
-            content_object=ContentObjectData(object_id=content_key_str)
+            content_object=ContentObjectChangedData(
+                object_id=content_key_str,
+                changes=["tags"],
+            )
         )
 
 
@@ -378,7 +381,7 @@ def tag_object(
     Replaces the existing ObjectTag entries for the given taxonomy + object_id
     with the given list of tags, if the taxonomy can be used by the given object_id.
 
-    This is a wrapper around oel_tagging.tag_object that adds emitting the `CONTENT_OBJECT_TAGS_CHANGED` event
+    This is a wrapper around oel_tagging.tag_object that adds emitting the `CONTENT_OBJECT_ASSOCIATIONS_CHANGED` event
     when tagging an object.
 
     tags: A list of the values of the tags from this taxonomy to apply.
@@ -399,9 +402,12 @@ def tag_object(
             taxonomy=taxonomy,
             tags=tags,
         )
-        CONTENT_OBJECT_TAGS_CHANGED.send_event(
+        CONTENT_OBJECT_ASSOCIATIONS_CHANGED.send_event(
             time=now(),
-            content_object=ContentObjectData(object_id=object_id)
+            content_object=ContentObjectChangedData(
+                object_id=object_id,
+                changes=["tags"],
+            )
         )
 
 # Expose the oel_tagging APIs
diff --git a/openedx/core/djangoapps/content_tagging/rest_api/v1/views.py b/openedx/core/djangoapps/content_tagging/rest_api/v1/views.py
index 71b210b9e561..3fc99736bae9 100644
--- a/openedx/core/djangoapps/content_tagging/rest_api/v1/views.py
+++ b/openedx/core/djangoapps/content_tagging/rest_api/v1/views.py
@@ -13,8 +13,11 @@
 from rest_framework.request import Request
 from rest_framework.response import Response
 from rest_framework.views import APIView
-from openedx_events.content_authoring.data import ContentObjectData
-from openedx_events.content_authoring.signals import CONTENT_OBJECT_TAGS_CHANGED
+from openedx_events.content_authoring.data import ContentObjectData, ContentObjectChangedData
+from openedx_events.content_authoring.signals import (
+    CONTENT_OBJECT_ASSOCIATIONS_CHANGED,
+    CONTENT_OBJECT_TAGS_CHANGED,
+)
 
 from ...auth import has_view_object_tags_access
 from ...api import (
@@ -149,14 +152,24 @@ class ObjectTagOrgView(ObjectTagView):
 
     def update(self, request, *args, **kwargs) -> Response:
         """
-        Extend the update method to fire CONTENT_OBJECT_TAGS_CHANGED event
+        Extend the update method to fire CONTENT_OBJECT_ASSOCIATIONS_CHANGED event
         """
         response = super().update(request, *args, **kwargs)
         if response.status_code == 200:
             object_id = kwargs.get('object_id')
+
+            CONTENT_OBJECT_ASSOCIATIONS_CHANGED.send_event(
+                content_object=ContentObjectChangedData(
+                    object_id=object_id,
+                    changes=["tags"],
+                )
+            )
+
+            # Emit a (deprecated) CONTENT_OBJECT_TAGS_CHANGED event too
             CONTENT_OBJECT_TAGS_CHANGED.send_event(
                 content_object=ContentObjectData(object_id=object_id)
             )
+
         return response