{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "540848139",
    "entityType": "User",
    "nonce": "0x03dff8bdb79882921a212b53c512485d0aac857c413f2398f64bd50fc49765a7",
    "signature": "0x2815ac20bbc3fc4910948e41be52c9590687dfda8780af36115a6b77ee96ec3606ad748a885141aee46bb8c7296a18a7f75bccff048691d5ccb607625c3a24901c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}