code: def new_media_object(blog_id, username, password, media):
      
      authenticate(username, password)
      path = default_storage.save(Entry().image_upload_to(media['name']),
                                  ContentFile(media['bits'].data))
      return {'url': default_storage.url(path)}
docs: metaWeblog.newMediaObject(blog_id, username, password, media)
      => media structure