create_style support for charset UTF-8

[iByteDev]

I am using the create_style method however I have a need for my style to support UTF-8 but I am not succeeding.

Expected behavior I have a word that is económico (is spanish) but in GeoServer it passes as económico

I have tried sending the following in the headers: "Accept-Charset": "UTF-8"but it hasn't worked

Screenshots If applicable, add screenshots to help explain your problem.

Additional information:

• GeoServer version 2.16.3

I will appreciate your help.