{
  "manageEntity": {
    "action": "Save",
    "entityId": "1639970499",
    "entityType": "Track",
    "nonce": "0x71b4ed9bbd15e9aaf60f5cc45683968f9655f16849ab23748d9d150c49580cb0",
    "signature": "0x6661b94cfeea78602162591a2601c80394fb9ce6527fa2c5603bdf1943fc6c590fcb712788baac7d2039bab462747a993ff7f0ae0540969bd67eda5068e04aa31b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}