{
  "manageEntity": {
    "action": "Save",
    "entityId": "2143322865",
    "entityType": "Track",
    "nonce": "0x0769c17c425d3387ef91655a38e266a248c0aaefafdc92a38aef22d7fb9379b1",
    "signature": "0xcd66e1d2f2776b404a57c43e319a487da388cbd8c7da6929cb98c0e25b7b25ee757e003a4bdff69d8e5e6ffb7d60a98a3f38b56147f82ccde444ba0a8caee9071b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}