{
  "manageEntity": {
    "action": "Save",
    "entityId": "1541993519",
    "entityType": "Track",
    "nonce": "0x1514b159513bb1b1d9f628fd7323a60be8c04b50bc252fdc7a04f1cac8cea34a",
    "signature": "0xa574e58696ffb50c9eb7906c9000dc7fdff75b36bc0d97bfbf501039d450f787601e85c2186266c5ed9e3aa52f0c5f3ab9912471fb5c88b3b582f799f4cadb211b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}