{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "819568368",
    "entityType": "User",
    "nonce": "0x35e21b3a4296db405c13748bb2931092b161fb2b8e83fc3af98cae6510be7e45",
    "signature": "0x0913fd2766ffcbcdaaab1f5d87b4b4a7d2b43a3f406fe7761d9db97b9990a5b753fc3b770627a6c20f4d2b2b844c44285108607a16dc5a3ea1dd9d146076084d1b",
    "signer": "0x94e0dDC50579175818AaCFBC9aba8B065fEf2a55",
    "userId": "460147282"
  }
}