{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xc006f4068c97ebcaf2f8fabd37ba5a03397041ede53c20505749c5a98a1b3489",
    "signature": "0x747eaf6ad14b694d5308d84d0282563c95a1e01a316abad816479d68c4150935007248bddadf4bb8e7c4ea5faee7f585f96a692891a322ff2cf747711c39ebaf1b",
    "signer": "0xd66DdDC5FCF82a48132f6FBf396EEF8904C28bF0",
    "userId": "821334815"
  }
}