{
  "manageEntity": {
    "action": "Save",
    "entityId": "1386315831",
    "entityType": "Track",
    "nonce": "0x1fd8a0d4a0060aec7d8ac82c4f79c8163d58713d988ec3af76f9954dcf1dbb8f",
    "signature": "0x6000944e75471a3c9790f54877248a810351315f7daada4f14f74a57392277cf1acc192fbf4c40908f004ebb7c633ffe19854e664ca6a8576dd544717338d6ee1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}