{
  "fields": [{"id":"_id","type":"int"},{"id":"id_dim","type":"text","info":{"label":"id_dim"}},{"id":"col_group_1","type":"numeric","info":{"label":"col_group_1"}}],
  "records": [
    [1,"DEF",27],
    [2,"ABC",32],
    [3,"HIJ",60],
    [4,"NOP",28],
    [5,"KLM",97]
]}