{
  "manageEntity": {
    "action": "Save",
    "entityId": "1581111995",
    "entityType": "Track",
    "nonce": "1792397007864559034",
    "signature": "0xec8582f45ec2fd008c9c65750a352ed0e02f287c83f40f3bea6043bb22f1e9cf0bda8256606ccce0f97d146244639899916e3151d9ebaf5e6d8f3559d01ffc781b",
    "signer": "0x1007e09532BE90331E035838A9E2E0700bB9741a",
    "userId": "329513359"
  }
}