{
  "manageEntity": {
    "action": "Save",
    "entityId": "220510454",
    "entityType": "Track",
    "nonce": "0x6a479dc43811b4f2a9c8c6ad28872e39b7ea659ee9129a3b0247fe74b908e6cb",
    "signature": "0x43009d9b014f8df4ac7a55927d99983895679d59733d81217b3d63c431f614c6620dd4de43e7ab22adf930713c3a4bbf3efcf71d81cf1ce2f6a96d007710f2331b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}