{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "839739705",
    "entityType": "User",
    "nonce": "0x5bd96ebd087fae1d6fe5c87f8531ceaba8b7f8e7123eff7e042d557a797f66ae",
    "signature": "0x5625e5780df8bf59c4327721235ef4c4cc3dc78872d83a2fdd1b0de62be1672250f8f22a9321004e1156fa482a78e1ec6ff22b3ea3837340c17bcbd9afb3ad801c",
    "signer": "0xd489B786708CDd8661b152CFF27695dC12c8c0C9",
    "userId": "647391197"
  }
}