You gotta read it carefully.
Right clicking a request to timings and selecting copy a cURL will give you all you need for a request using the cURL syntax (the standard format for most people):
curl 'https://meta.discourse.org/topics/timings' \
-H 'Accept: */*' \
-H 'Accept-Language: en-US,en;q=0.5' \
-H 'X-CSRF-Token: LONGTOKENHERE' \
-H 'Content-Type: application/x-www-form-urlencoded; charset=UTF-8' \
-H 'X-SILENCE-LOGGER: true' \
-H 'Discourse-Logged-In: true' \
-H 'Discourse-Visible: true' \
-H 'X-Requested-With: XMLHttpRequest' \
--data 'timings%5B3%5D=1019&timings%5B4%5D=1019&topic_time=1019&topic_id=108685' \
--compressed