"name": "field", the name of the key or data field to sort the results by. Note that this field can be any key field, specified in the split_by POST argument, or one of the data fields specified by the data_fields POST argument (or any of the data fields if the data_fields POST argument is not specified). The default value is the first column with enabled percent.
"mapping": defines whether to sort by key field ID or by key field mapping. Possible values: (0 - sort by key field ID, 1 - sort by key field mapping). The default value is 0.
"direction": sort in the ascending or descending order, either ASC or DESC. The default value is DESC.