{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "54812",
    "entityType": "User",
    "nonce": "0x6f3229d8d737f1ec35c21cf8b24b9d9dc698d28982199806e2390a0f7178d8fa",
    "signature": "0x0a974e5dae978e5697a885d56eb85eca544439e6f3d1f44d3b4c0abb9fa8b97e16e3b6cbd189a2a33ed50dd03e88cc57579fe581e0fcc72278896f5c3f08d0111b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}