test.html

<form method="POST" action="http://localhost:2000/grove/shop/">
    <input type="hidden" name="query" id="query" 
    value ='{ "query" :
                [   {"columns" : [ "item" ]}, 
                    {"operations" :  [{"eq" : {"item": { "atom" : "apple"}}}]}, 
                    {"order" : "ascending" }
                ] 
            }'
    />
    <input type="Submit" value="Query Shop" />
</form>