Problems with ä,ö,ü,É,é,Ç by using webservice

Hello,

I use the Moodle web services, among other things, to create new users.

Now I have names like this

Peter Meyer

which are also displayed correctly in the database.

The whole thing becomes more difficult with e.g.

Teacher Lämpel

When I create it via the web service, I get

L%C3%83%C2%A4mpel

as a last name.

I'm currently using

urlencode

to pass the last name to the url.

What do I have to do so that Lämpel appears in exactly the same way, namely as Lämpel, in the database?

Thanks for help