{
  "fields": [{"id":"_id","type":"int"},{"id":"a","type":"numeric","info":{"label":"a"}},{"id":"b","type":"text","info":{"label":"b"}},{"id":"c","type":"text","info":{"label":"c"}}],
  "records": [
    [1,10,"ba","blab"],
    [2,20,"baa","blab"],
    [3,30,"bcc","blab"]
]}