{
  "manageEntity": {
    "action": "Save",
    "entityId": "1524740377",
    "entityType": "Track",
    "nonce": "0x563b0a838de88db0d02cc4fed6e40ff2c10bfa92f9d14d12ea5f296568cac8d6",
    "signature": "0xb3baaaf7c3c6337226897abf96bba9578dc28000b244049ad7cd314fda0bfa1f671c3d469747226ee8cd21e67575091d7dba1bec9a8baac8edd553a3bb90d7d11b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}