{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xe692f780128c8b1b8890a6a0d4989c898f1e4946b5d82fa7987b954033c99958",
    "signature": "0xd44bfef05adb8de108f4b1c484da4112c08eef3f0b16ed84eb378835ab60d70022d6f2966d26619ce12f5d6ec73edcb758898528598d04e83f6680b95e55d60b1c",
    "signer": "0x75adc2A133575527B87d56CA442911D4f02b7B52",
    "userId": "487781531"
  }
}