{
  "fields": [{"id":"_id","type":"int"},{"id":"column_name","type":"text"},{"id":"column_type","type":"text"},{"id":"description","type":"text"}],
  "records": [
    [1,"_id","Number","ลำดับรายการ"],
    [2,"year","String","ปีงบประมาณ"],
    [3,"highway_name","String","ชื่อทางพิเศษ"],
    [4,"plaza_name","String","ด่านเก็บค่าผ่านทาง"],
    [5,"traffic","Long","ปริมาณจราจร (คัน)"]
]}