{
  "manageEntity": {
    "action": "Save",
    "entityId": "703996",
    "entityType": "Track",
    "nonce": "0x380bd1250525c99715c347119d7cada607b7c2011abfd9600b5e48451f5aa784",
    "signature": "0x36d105f6d23ef089b86736343122ea25d0bf583f3b9cdbebe91e3e48b20056a84700a1f263380fbb766aab33bfa474e9f48d23622994788c60dfb62d7318a3471b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}