Update a worklog
Updates an existing worklog. Set TimeSpentInSeconds, Comment, and/or StartedAt, and identify the issue and worklog with IssueIdOrKey and WorklogId in WITH.
UPDATE Worklogs
SET TimeSpentInSeconds = 28800
,Comment='My Comment!'
,StartedAt='2020-01-23T16:20:30.123+0000'
WITH (IssueIdOrKey='MTK-1', WorklogId='123465', OUTPUT=1, ContinueOn404Error=0)