sample_data_2.json

{
"INDEX":{"N":12,"T":"ulong","D":[123450,123451,123452,123453,123454,123455,123456,123457,123458,123459,123460,555555]},
"col_3_2":{"N":12,"T":"double","D":[15,16,17,18,19,20,21,22,23,24,25, 555.543]},
"col_4_2":{"N":6,"T":"double","D":[22,23,24,25,26,27]},
"col_str_2":{"N":12,"T":"string","D":["11","22","33","aa","bb","cc","dd","tt","uu","ii","88",
                                    "This is a test"]},
"col_2_2":{"N":12,"T":"double","D":[8,9,10,11,12,13,14,15,16,17,18, 777.78]},
"col_1_2":{"N":12,"T":"double","D":[1,2,3,4,5,6,7,8,9,10,11,
                                    55.55]},
"col_char":{"N":12,"T":"char","D":[8,C,F,$,,8,120,88,h,u,18, 78]},
"col_uchar":{"N":12,"T":"uchar","D":[8,C,F,$,,8,220,88,h,&,18, 255]}
}