{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "619242476",
    "entityType": "User",
    "nonce": "0x9db7bee8a884d21eec41792a19f81081fd869b7c8d759ab693eb9fccbe9026ab",
    "signature": "0xcfa3628894baa27fb20654c9a27d3c7cd7ed53941be045cc716e7aef73d6cb0a51a3ce4864ff0f718b415cdd9a81a4b41cf81f8aa32a250c95050256340e2d1b1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}