{
  "manageEntity": {
    "action": "Save",
    "entityId": "1104776650",
    "entityType": "Track",
    "nonce": "0x5e9ceca1fc474210a89daffba9e7025a2b3086889c8e95a9f61fa55d2c30f8da",
    "signature": "0x54cbe7b27aecb777866eb84fc25e29f14b5b1245229dc4b26411ef8788bd74fc70f3dc19d14d89a3c6d5f73ce377579277fd83efaa2a7a15d61aecb5c27294b01b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}