{"timeBuckets":["1m","1h","1d"],
 "values":
  [{"name":"impressions","type":"long","aggregators":["SUM","AVG"]},
   {"name":"clicks","type":"long","aggregators":["SUM","AVG"]},
   {"name":"cost","type":"double","aggregators":["SUM","AVG"]},
   {"name":"revenue","type":"double","aggregators":["SUM","AVG"]}]
}