{
   "time": {
       "start": "1h-ago",
       "aggregator":"sum",
       "downsampler": {
           "interval": "1m",
           "aggregator": "avg",
           "fillPolicy": {
               "policy": "nan"
           }
       }
   },
   "filters": [
       {
           "tags": [
               {
                   "type": "literal_or",
                   "tagk": "host",
                   "filter": "use1-mon-metrics-1",
                   "groupBy": true
               },
               {
                   "type": "literal_or",
                   "tagk": "group",
                   "filter": "monitoring",
                   "groupBy": true
               },
               {
                   "type": "literal_or",
                   "tagk": "dc",
                   "filter": "us-east-1",
                   "groupBy": true
               },
               {
                   "type": "literal_or",
                   "tagk": "rack",
                   "filter": "undef",
                   "groupBy": true
               },
               {
                   "type": "literal_or",
                   "tagk": "row",
                   "filter": "undef",
                   "groupBy": true
               }
           ],
           "id": "f1"
       }
   ],
   "metrics": [
       {
           "id": "a",
           "metric": "system.load5",
           "filter": "f1",
           "fillPolicy":{"policy":"nan"}
       }
   ],
   "expressions": [],
   "outputs":[
     {"id":"a", "alias":"query"}
   ]
}