Send the basic copy by XML

{
  "file": {
    "content": "data:...",
    "contentType": "application/xml",
    "name": "document.xml",
    "size": 1024
  }
}

{
  "success": true,
  "message": "OK",
  "data": {
    "file": {
      "contentType": "application/pdf",
      "name": "document.pdf",
      "content": "base64"
    }
  }
}