{
  "manageEntity": {
    "action": "Save",
    "entityId": "419216",
    "entityType": "Track",
    "nonce": "0x70551434c1e9a6b7fa6bc671f69bd920f4f1c84a7d752cd745df1f3b4cfc37a3",
    "signature": "0x06ab3f9c8b134eccb390b86358418e6165b785b15e73cfa7c25540fb3af724b12d156a49ad8d6434081c0a5b4481b369f3980cf8688e86cb5ef0492db50caed61c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}