No support for nested arrays in query parameters?

What I want to do i essentially this: ?where[]=user,1&where[]=section,7

After a bit of tinkering and and checking out what was discussed on Swagger Google Group a while ago, I arrived at the following implementation:

                "parameters": [
                    {
                        "name": "where[]",
                        "in": "query",
                        "description": "Filter by attribute value",
                        "required": false,
                        "type": "array",
                        "items": {
                            "type": "array",
                            "items": {
                                "type": "string"
                            },
                            "collectionFormat": "csv"
                        },
                        "collectionFormat": "multi"
                    }
                ],

I guess, the problem is swagger-ui relies on line breaks to identify array items in the textarea field. It will correctly recognize only the top-level array, but everything else (in my case, commas) will be url encoded and ignored. Is there a way to circumvent this? Am I even doing it correctly?

Start by reproducing the supplied nested-array query parameter definition and request in Swagger UI, then trace how the textarea input is converted into query values and URL encoding. Done means nested array items are represented and serialized as intended rather than being treated as top-level lines with encoded commas.