{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "708077815",
    "entityType": "User",
    "nonce": "0xb4b6cdb56be074d2b4bd82412fa462eb0b8bc4d90346b5354ee039b395a35226",
    "signature": "0xea192db024adb964cb772f2ed9ab38876f66bf2b50be50b1d6a5bb05b2057ba20bd36be8b6aaeb2d29b1018c94774fba4205586942af555537c6daea0f4f7d291c",
    "signer": "0x8E3A4E1A0d1Aa7628E0FDbc872062F921A449403",
    "userId": "552753858"
  }
}