{
  "manageEntity": {
    "action": "Save",
    "entityId": "193137",
    "entityType": "Track",
    "nonce": "0xd7b58b861f47c1d004c8ba2fe9304490556956e8dec0929e561b3df206d9203c",
    "signature": "0xb0eade6657df37f45421b5510b3b141af165dbfbc68e931f12b5842f9f88efd91338a045fd284116882741772c376b5045c52e9b871b4fd085f87658b648de621c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}