{
  "manageEntity": {
    "action": "Save",
    "entityId": "723241",
    "entityType": "Track",
    "nonce": "0x155e8ddb1f34ee3932d8821624f6385eb694c6d77ac7b6d00e3cc4878cc26b3a",
    "signature": "0x5e3cbad5ae1c8045cfb5b0464e4d4b3cbf8a485ecae7960c0ca179392fb325011b27e5baad7a37d22eb80cfe073f69dac1aaa132129108cace5da492b6c9d5281c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}