{

   "Ad_Device":"desktop",

   "Cell":"SheetName",

   "Exposure_Duration":"11",

   "Page_Path":"/fltest/Viacheslav_Svash/visibility_test/playerjs/index.html",

   "Query_Parameters":"?utm_campaign=ID&time=11&origin=https://www.google.com&utm_source=Doc.Name&utm_medium=SheetName",

   "Study_Number":"Doc.Name",

   "UserHash":"ID",

   "Video":{ //Type

      "test_pre-roll":{ //Name

         "Key1": "value1",

         "Key2": "value2",

         "Key3": "value3",

         "Key3": "value4"

      },

      "visibility duration":7.1,

      "visibility fraction":1,

      "visibility share":1

   }

}