json.json

{
  "facet_counts":{
    "facet_pivot":{
      "category_level0,category_level1,category_level2,category_level3":[{
          "field":"cat0",
          "value":"A",
          "count":123
        },
        {
          "field":"cat0",
          "value":"B",
          "count":456
        },
        {
          "field":"cat0",
          "value":"C",
          "count":789
      }]
    }
  }
}