{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "721084704",
    "entityType": "User",
    "nonce": "0xca5a53a7006d403b8cc4ab5ca2949ee6aa06083741fe83c39c952cb3513ce072",
    "signature": "0x5809e43c71e460959272bb9ee8d680af58694853cb3f40b01ed933cdbf418c2d4cf63b323a3018876ed7a8ce6728ab94c4c0f5996b17f820d11f72173f3501231b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}