"Wrong" encoding in webservice when asking for json

Sunset

For a webservice in NAV2018 I have regular listpage showing all the customers that has been exposed as a webservice.
When getting the data in an xml file everything looks as it should, but if when asking for the data in JSON all of the special characters æøå seem to use unicode. ie København transform into K\u00f8benhavn
Is there anyway to avoid this transformation?

irasoelbaks

Please try to send this header in your request. Maybe it will solve the problem?

Content-type: application/json; charset=utf-8