{
  "manageEntity": {
    "action": "Save",
    "entityId": "1946960797",
    "entityType": "Track",
    "nonce": "0xe276bbc0afd53449cfa6abec34e83955d1ae67e86451fceca3ba3eb4b4e4e68a",
    "signature": "0x5efb3bb7c3115719a5cb56ca0d6d489b582d3b5603d08e463c580a26bf700b900a604e8403c479f4c77e00e2fc196236b30e7af9ef6cbe33cbd84c2c0b0e77f31b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}