{
  "manageEntity": {
    "action": "Save",
    "entityId": "1662435937",
    "entityType": "Track",
    "nonce": "0x54f5cd046dd6fa0732a54054201dcc1687d447519652709b4477e939b8ccfda0",
    "signature": "0xc66cb5e1f57069d8c608b5b28bf259851310eab2be4a398c64426bb3744c92695774fae5e76a4b7ce3a6124cc99bfe420260b484d3566a67560ae47688f49f211c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}