{
  "manageEntity": {
    "action": "Save",
    "entityId": "1003949316",
    "entityType": "Track",
    "nonce": "0x15a698ee50959233e943d998482e91811f630af57feb230ca9cbec39c54137ba",
    "signature": "0xca328eacd30c8b1ea2c53141765b30da9b2e5bf5dabe4c40fc60d51cb2ec9f4b2b3e1b1831b2e5f1b8e8df7151b7bfbe40cc4ab414e52d5248d77966fa83ea611c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}