How to combine query_string and range of timestamp in elasticsearch

I have two query. One is searching in logmessage and second time in range of timestamp.

query = {
    "query": {
        "query_string" : {
            "query" : "logmessage:test"
        }
    }

and

query = {
    "query": {
"range" : {
            "@timestamp" : {
                "lte" : "2017-08-04"
            }                   
        }
    }

How I can create one with both options ? I tried this:

    query = {
        "query": {
            "query_string" : {
                "query" : "logmessage:test"
            },
    "range" : {
                "@timestamp" : {
                    "gte" : "2017-08-04",
                    "lte" : "now"
                }                   
            }
        }
    }

but with no success. There is some 400 error because of bad syntax I guess