{
  "manageEntity": {
    "action": "Save",
    "entityId": "655429860",
    "entityType": "Track",
    "nonce": "0xcf7895663fb7b3a57b89bb4644ff60426d83c573d4befc987739a87ed17aed6c",
    "signature": "0x4c6f8a6f92e5235958a015a76ff2de6a8150dc0cb22d981395c3bc8ed06d8dd101a3e2c8a37323667e54229261492123e402c032c26b772c242ad3a543530a2d1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}