Add xEGLD signature + locked accounts cleanup

[mihaieremia]

No description provided.

[mihaieremia]

{
"message": "35643964353232636639653236653931323966383537633261393363656631303261613433663964",
"signature": "eda135bc1a82b78a0da910f86731f933faa79516537003f0ecba8336dd2484628f63e4ca0ae4be1a3f4e86e0e017806fd953d1f57abde9d2c04e87091de1d80e",
"address": "erd1fmd662htrgt07xxd8me09newa9s0euzvpz3wp0c4pz78f83grt9qm6pn57",
"version": 1,
"signer": "extension"
}