{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "50621",
    "entityType": "User",
    "nonce": "0xbed57ce0f4106cbe52325f5c2fc2d0c8d7709b5bc81aa6657c096bad7e6ce722",
    "signature": "0x6fe291edc801052b621d0f4a544e40c3843c242fac237cec39214599a04efa5724c597911596314d1212248675597a0763b1fc7676fc2cc037848a194630d06b1b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}