{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x99a16e0db41f8d2c844576d78c76b263d9412788a012194c4572d04a12434d62",
    "signature": "0x44f5d312eb9a5861dd489a67a068f95fa2ab8abf7bfe25b99215985834bc26ec6f2182991343c825a4de6236f1fd2718be454f6e71b4d2fed37fdd8e266d79b21b",
    "signer": "0x6e2CEb8Cd4f0A669607De6c8686f7B2E15dEaed4",
    "userId": "597766938"
  }
}