{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "220800",
    "entityType": "User",
    "nonce": "0x2dd6a7b1d58b58f08fd28d3123bae6a67f9bc172a163a531e55b9221795ac6aa",
    "signature": "0xcd6fe3a129bd6ea28fdaaa57eeeca2dae55fb10fcc8be7c2bc1b8d895c64d4332a611f07cfc1f53b23fc5d4e5867723c7cc71506a36aec2c652121d2af0f9f671c",
    "signer": "0xB874f4621c8c59121feacEaD49e379Baa95ebC5b",
    "userId": "480497000"
  }
}