The POST method
The POST method is used to create or to modify scores.
The HTTP request entity-body is expected to contain valid GMN code that is URL encoded. Many URL transfer tools do this URL encoding automatically for certain POST methods. When in doubt, use a URL encoding method like, for example, the function urlencode in PHP.
You have two differents manners to create score. You can send totality of your score or send your score as a stream.