{
  "manageEntity": {
    "action": "Save",
    "entityId": "2037565319",
    "entityType": "Track",
    "nonce": "0xe42a3de6291bd9538c8963c6045a077cddd00add85feb31846e0995c774588ca",
    "signature": "0xc4d73a4246c02a8fa0a1dd6658aa6eb05146b8ba89534388428b7fe14331e98d0ff1f11a19f249514e0427c9a93e184f834c9069052db7e851961a4727e7a6da1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}