KMZ to JSON

i have seen a lot of write ups with this heading but none actually do what the title says. i have been able to read a kmz and get it to a writer but the .json file is empty. there is no error message, just no data when i inspect the json. i have attached the workbench. i want the user to select a kmz and the workbench write it as a json, i am using ESRI JSON because the GeoJSON will error out.