{
  "manageEntity": {
    "action": "Save",
    "entityId": "2106752349",
    "entityType": "Track",
    "nonce": "0x1c947e6bee7c7c591d656ce9bde183cac57b7f16ab836accdf938be0484d436f",
    "signature": "0x3d64fb3b585162d11784dc4bb95f304d9f4f4ec2b421bf91f4a31045e47afe8b378b199ca9a58dc92107dfcd48fb24bb2bfcecfece141fefede4c969fd7fcb901b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}