1. Create new publication, name it whatever
2. Click the "Custom Page" tab to add a new page:
  - name it with the desired payload as the title: `aaa" onclick='alert(123);' ">`
  - select the publication you just created by checking the box next to it.
  - click publish
3. Go back to the list of publications, open the one you created and go to the "All Pages" tab:
  - click on the title of the page created in 2, and the payload triggers