{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xa44f286c7c3d393ee3fe5ccd9f2e499ea4be58adeb3968de0d844e8b51fe619c",
    "signature": "0x52f9d0944c0d1029b8fb7496641bc5e3e62cd8f7e461873e13e2ffe2b3d042c352077b5f4b54c26e2334f1babed9106e98b9bafe36e7238f728ad5914a8a3c391c",
    "signer": "0xAC7121C67E0d4d4823566452268A1996490854EE",
    "userId": "674693925"
  }
}