Downloading a Version's Attachment

It is important to note that this endpoint returns whatever is currently uploaded against the particular version of the Submission. It will not track overwritten attachments. This endpoint supports ETag, which can be used to avoid downloading the same content more than once. When an API consumer calls this endpoint, it returns a value in ETag header, you can pass this value in the header If-None-Match of subsequent requests. If the file has not been changed since the previous request, you will receive 304 Not Modified response otherwise you'll get the latest file.