{
  "manageEntity": {
    "action": "Save",
    "entityId": "1961349529",
    "entityType": "Track",
    "nonce": "0x450b65852e543d1b6656a4b8510909e75854afd3502e52f7b491c5f69ef20085",
    "signature": "0x6df7799fde4a5a02338d440f90f13251673eaed6c14777787324586305d0965c451ebe6de7fc44f1f3d8772ccbe4af89aab75deb16e8728f453ce50d0cff1cdf1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}