{
  "manageEntity": {
    "action": "Save",
    "entityId": "365122",
    "entityType": "Track",
    "nonce": "0xcd81588653d6d81bfbaba7534bba0028e969ef6f4e9b7ec14b04d2f7072c7e5a",
    "signature": "0x130208d2508ddf040133a764704c7577e09861acceac4c0ceed03bea7ad682321b95bdd039fd8f9b37e47dc32f7db2f7d618fd3fbd84d533a098aec8fbbe5d821c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}