Json post request

How do I make a json post request with screen-scraper? I need to load the following url (curl example)

curl "https://www.lg.com/nl/mkt/ajax/category/retrieveCategoryProductList" --data "categoryId=CT20182041&modelStatusCode=ACTIVE&bizType=B2C&viewAll=&filterFlag=Y&length=9&sort=&page=1&pagePosition="

On the scrapeable file >

On the scrapeable file > parameters tab, there is 2 sub-tabs. The default is the key/value pairs that are most common, but the request entity tab is for cases where you need to post a JSON or XML object in the request.