POST <?xml version="1.0" encoding="UTF-8"?> <SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/"><SOAP-ENV:Body><ns0:AttachmentRequest..many more elements...</ns0:AttachmentRequest></SOAP-ENV:Body></SOAP-ENV:Envelope> Attachment binary/xml JVBERi01GESKSK... **BINARY CONTENT**