{
  "manageEntity": {
    "action": "Save",
    "entityId": "51353",
    "entityType": "Track",
    "nonce": "0x2b8d5b12e76eb5c0e031db9fd0274abedf8eb99d994f5f134fbe975286d0984b",
    "signature": "0x723c5cc6df272a24f95f7f302d72d4d85a33bcffec1822f72ede0aa8860c18f64f42f4fa379e4a6840fc9d31a215fac5dc2036a779c5cdc4ef0fd3cef5885b601b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}