{
  "manageEntity": {
    "action": "Save",
    "entityId": "1107466",
    "entityType": "Track",
    "nonce": "0xc8cc58d3402ba46cb3c7fdba24936218c9ea7de28b626fd9658f21f7e3eede6a",
    "signature": "0x5f12521829255c03f78bc5f617508c291af88f7dafe597e92be352d521da787c15d39f8f59dffedf3bb2821c2554035707ed8b7036de4608656b1b614231252a1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}