Project in Drafts url scheme

I use this Draft action to add line to Omnifocus with Drafts.
I have a question. I use this line “Task @due(12-04-2018 7pm)” to add a task with a due date. It works fine! But I want to add a project too but I doesn’t work.
Can anybody help?

Update: I forgot the Draft action I use…
This is the link: