{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "3407",
    "entityType": "User",
    "nonce": "0xe7e85f00045d815fdd4e110100735d5e28ca77743a4a22a24dfb08d9e17748ae",
    "signature": "0x38dc839c72d15fd09d54215647f11355f8723db8ff21d4f7fc16052bfdadfacd4d0f1776f3b56130765c39c45c10a1a77962883fb7766f850af7989cf5c8a7701c",
    "signer": "0x72C3229e8a009963fcCB987460463895a2989d71",
    "userId": "109371348"
  }
}