{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xa0cfc84b4f8ed9ec7fa9ac187a011d6ea2920500e6761f64a3e51cd4111e4eae",
    "signature": "0x5999ab9250a30608b09c50f1426a1a27d5357a51ec6cf7400414bf590f4dfbe479390b883f58ec7f87bec5539c6c3690082740e34e321ea0d08a37bab95537e41c",
    "signer": "0x125A6d7FBb28E396C1125a533E5D1395A4854729",
    "userId": "297507654"
  }
}