Trouble generating download file as endpoint output

[Eric Haniak]

I'm having difficulty getting a file to download. I keep getting the error: "Unknown response type". Here's my response in json:

"responses" : {
                    "200": {
                    "description": "model ZIP File",
                        "schema": {
                            "type": "file"
                           
             
                        },
            },
                       
                    }

Not sure what I'm doing wrong here. Please help!