how to percolate elastic search with a query string

ES percolate QS

working percolator with only fiters:

{
    "_index": "_percolator",
    "_type": "document",
    "_id": "0e63ed80-fc58-11e1-9857-f17a6fbf875a",
    "_version": 1,
    "exists": true,
    "_source": {"query": {
        "filtered": {
         "query": {
            "match_all": {}
            },
        "filter": {
            "and": [
                 {"missing": {"field": "redirect"}},
                {"term": {"field": "value"}}
             ]}
    }}}
}

Where to add the querystring to match a string in _all.

{
    "_index": "_percolator",
    "_type": "document",
    "_id": "4984ebe0-fc65-11e1-a1c7-8bc204bcd862",
    "_version": 1,
    "exists": true,
    "_source": {"query":
            {"filtered": {
                "query": {
                    "query_string": {"query": "some query"}
                 },
                 "filter": {
                        "and": [
                             {"missing": {"field": "redirect"}},
                             {"term": {"field": "value"}}
                            ]}
                  }
             }
       }
}

The percolator is accepted by ES, but it never appears as a percolate match :-(