No Content-Type at generate signed url with GCS resource query

I'm trying to implement upload PNG images to GCS using the built in GCS Resource Query Library.
When I pick "generaate signed url", it does not let me choose the content type of the file. I do need to set it to "image/png" eventually. It must be at this stage.

Attached screenshot:

Hey @gioragen - can you explain your use case in a little more detail? If your primary goal is just to upload a file, you can do so (and set its Content-Type) with the Upload data action.