{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x98e38f2b86cfc71f2a84cb98ffcc07459322945f0214a56fdb0c1d4053b5b3ed",
    "signature": "0x8eb224cc6f06e017f8aaab1bcec5d82c15614e14bfbd54ca4bb69476b292df675753a7107364050b44e01a2080b5e47e62a99db82a8dfe427b22ee593ba0542f1c",
    "signer": "0x50b3a71C5800d09987e55a99E96a2eAd00574F4F",
    "userId": "225600275"
  }
}