{
  "manageEntity": {
    "action": "Save",
    "entityId": "1809370998",
    "entityType": "Track",
    "nonce": "0xd0b7f84d13c6d243d7ee60544c14d0122767e71d660ad4cea650d556eb5c881d",
    "signature": "0xb4f2e4d914484a8197668a6988124a7602cb99dd02e9c355f63601e8b4832ecf65e92a726495ea3d4df393727c4d3801d0f805e2941bf0dcfeed923da7b4cd191b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}