Как *curl* преобразовать в NSURLSession или Alamofire.request(), с учетом параметров

curl

Например такая строка из терминала:

curl -X GET \
-H "X-Parse-Application-Id: ad383bxkAmwAgKgPEqZHjewleWi2bLmNTlctBuky" \
-H "X-Parse-Master-Key: qTJ3eatgZppvAWqkb82WsCoqG9MqRog2MBXqRHHv" \
-G \
--data-urlencode "where={\"parentID\":{\"\$exists\":false}}" \
https://parseapi.back4app.com/classes/category

Возвращает приемлемую для меня JSON-строку(ниже)

Меня интересует как заЭнкодить параметры:
--data-urlencode "where={\"parentID\":{\"\$exists\":false}}" \

если бы не было "where=" - то дальше там вполне себе нормальная JSON-строка.
Но вот эта where все портит.




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