Type or data image to upload Add Custom Playlist Cover Image

[ElectroRawe]

I am trying to change a playlist cover by this endpoint https://developer.spotify.com/documentation/web-api/reference/#/operations/upload-custom-playlist-co...

I have 401 Unauthorized response, but  the token is ok because i tried changing playlist details.

What type of body data needs to put the image on body? form-data?, raw (json) i tried many combinations with base64...

Thanks

[Ximzend]

I looked in the source code of a Web API Wrapper I'm using, and this is what I've found out: 

• It needs to be a PUT request.
• The payload needs to be a base 64 encoded string of an image.
• The maximum payload size is 256 KB.
• The content type needs to be "image/jpeg".