{
  "manageEntity": {
    "action": "Save",
    "entityId": "1666476981",
    "entityType": "Track",
    "nonce": "0x10cd1a13ac1bc57a8a24844e9cfa4d2b158f88a60a43b128efe88bc3161007f8",
    "signature": "0xdcd5c693d7483e94b94215060928afc8f6c3911dabd3630155cd2510a36f90ff7292a1daf7d23988199f33137331e434acf6968eca46d7ef1aa3549c86acae201c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}