How to pass the DateTime for start date filter

[kaylab]

WITH CONNECTION (
Url "https://paas-api.pluralsight.com/graphql",
QUERY "type" "JSON",
HTTPHEADER "Authorization" "Bearer <API KEY>,
HTTPHEADER "Content-Type" "application/json",
BODY "{""query"":""query{ courseProgress (first: $(totalCount) filter:{startDate: 1672549200000 } ) {nodes { userId percentComplete isCourseCompleted completedOn courseSeconds totalWatchedSeconds totalClipsWatched firstViewedClipOn lastViewedClipOn user { email isOnAccount} course {title id}}}}""}"
);

Does anyone know how to pass  DateTime for the start date filter? As of  now its in epoch time and results in nothing getting passed.