$ cat x2.txt 
{
  "facets": {
    "0": {
      "date_histogram": {
        "field": "@timestamp",
        "interval": "10s"
      },
      "global": true,
      "facet_filter": {
        "fquery": {
          "query": {
            "filtered": {
              "query": {
                "query_string": {
                  "query": "*"
                }
              },
              "filter": {
                "bool": {
                  "must": [
                    {
                      "range": {
                        "@timestamp": {
                          "from": 1481190511857,
                          "to": 1481191411857
                        }
                      }
                    }
                  ]
                }
              }
            }
          }
        }
      }
    }
  },
  "size": 0
}

$ curl -XGET -d@x2.txt 'http://localhost:9200/logstash-2016.12.08/_search?pretty'
{
  "error" : {
    "root_cause" : [ {
      "type" : "search_parse_exception",
      "reason" : "failed to parse search source. unknown search element [facets]",
      "line" : 1,
      "col" : 14
    } ],
    "type" : "search_phase_execution_exception",
    "reason" : "all shards failed",
    "phase" : "query_fetch",
    "grouped" : true,
    "failed_shards" : [ {
      "shard" : 0,
      "index" : "logstash-2016.12.08",
      "node" : "GRtI539QTjKO_C3gB9sgJQ",
      "reason" : {
        "type" : "search_parse_exception",
        "reason" : "failed to parse search source. unknown search element [facets]",
        "line" : 1,
        "col" : 14
      }
    } ]
  },
  "status" : 400
}