{
  "manageEntity": {
    "action": "Save",
    "entityId": "497322637",
    "entityType": "Track",
    "nonce": "0x7bdffe40803adde014eaa4aa43b82f5849094463bc2b52fddc3ff99300ea8fa9",
    "signature": "0x1833c47e26608fa5f443a4ac2b306cb773a3928e1b654c67dd419b3a0efe63f379351263d8609e161eb695a5c2cf685bb1b0b08c15342bd4115666c0b0ff1fd11c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}