The parameters listed in the payload resembles headers in the CSV file. To include a parameter to the file, add it to parameters.fields.
The available filters are all order object attributes. Additionally, any metadata defined in the metadata schema can be downloaded.
Passing an empty JSON will generate a file containing three default fields:
id of the export object and
status of the file generation process. The
id is used in the Download Export method to generate the url for the downloadable CSV file. The status indicates whether the file has been scheduled for creation.