{
  "manageEntity": {
    "action": "Save",
    "entityId": "489479007",
    "entityType": "Track",
    "nonce": "0xf1580e577653053bf467eca3f945f9ee751b98a7d62a689d215d329421b10645",
    "signature": "0xa1b46ed96d782c20af6859ce62744dfbcadfe772f0c9f1804de7913ce488b70129b0d6bca9096b1a3695f5279a056a421c414910222658e3fcbbeb5e8b783d4a1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}