{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "18937",
    "entityType": "User",
    "nonce": "0x53242bab67baaf87f5b3363e58e562181c614a83dc8425ef46c3e1b7bc5f2428",
    "signature": "0x3815d63af4b810981c3f967b500e8acab288a06d7919fd27dedbe6a7a0c5f3e159a3da14a32ddd40f670d04de29200f6b840d0fcaa620d7c7091a934e0c93e311b",
    "signer": "0x5823e56644991c5f5f29870830175996Edb011c0",
    "userId": "433764837"
  }
}