Add a download button to the interface & start the workflow.
Within the workflow, search for "JSON to CSV".

Add a filename as you wish (no need to add the file extension).

Within the JSON field, use "Do a search for" & select the data set you wish to download as CSV, followed by "Format as text".

Within the format section type according to the below format;

{
"ColumnName":"DynamicallySelectTheValue",
"ColumnName":"DynamicallySelectTheValue",
"ColumnName":"DynamicallySelectTheValue"
}

As the seperator use the " , ".

Close it & use the " , " as the delimiter.