cURL - is a command line tool allowing you to interact with services via different protocols with URL syntax. It is widely used today, including sending HTTP requests from the command line. TestMace allows you to import the curl command with parameters into a RequestStep node request.
There are two ways to import a request from cURL:
import from the project context menu: Import -> cURL;
You'll see the next dialog:
Here you need to set the new RequestStep node name and the import command.
Take a look at how a request is copied from the browser requests list as cURL: