The remote server returned an error: (415) Unsupported Media Type
https://stackoverflow.com/questions/20909118/the-remote-server-returned-an-error-415-unsupported-media-type
WEBJan 3, 2014 · There is built-in support for XML, JSON, and form-urlencoded data, and you can support additional media types by writing a media formatter. So, there is no built in text/plain formatter, ie: Unsupported Media Type. You can change the content-type to some supported, built-in, or implement custome one (as described in the link)
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