{
  "manageEntity": {
    "action": "Save",
    "entityId": "1438108360",
    "entityType": "Track",
    "nonce": "0x5c947ec8018f1735705d4b77c84a96140baa218fbc39f39991384179c8023f64",
    "signature": "0x4f720ce60060836ece8123022692a4ebf81f13907e11aaa4320e731e278579ad47698ba6dee6cd463ca8c9c2e6b06bc283efe3be49074a9b06e0f9ddf7abbae51c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}