{
  "manageEntity": {
    "action": "Save",
    "entityId": "293476",
    "entityType": "Track",
    "nonce": "0xdac67ded1d12d55454d723da33f435c5720d545a7ebf30ff183bca97098d4771",
    "signature": "0xb43c6f71a5dadb0a2e3f0e5c8e12d139a296672d2caa724d1969a8b89b7ffb4508574b58d499f851833f5eb4e6280bf6c9e0de28b967d5d68ea8bd4d645038001c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}