[{
  "alias": "",
  "bucketAggs": [
    {
      "field": "@timestamp",
      "id": "2",
      "settings": { "interval": "1m" },
      "type": "date_histogram"
    }
  ],
  "datasource": { "type": "elasticsearch", "uid": "uid" },
  "datasourceId": 42,
  "metrics": [{ "field": "counter", "id": "1", "type": "avg" }],
  "query": "",
  "refId": "A"
}]