milestones/:id/track_time

hours worked; optional

id of the activity for the work; required if you are using timesheets and provide a value for work

member_id against whom to track the work; optional, defaults to the current user

low estimate for remaining work, hours (or a string such as "4h", "0.5d"); optional, must be provided if you provide high, omit or set to '0' when setting is_done

high estimate for remaining work, hours (or a string such as "4h", "0.5d"); optional, must be provided if you provide low, omit or set to '0' when setting is_done

if true, marks task as done, low and high must each be zero; if false or omitted, sets task to not done (if it is done, otherwise no effect)

datetime on which the task was done; valid only when is_done=true, defaults to now

date on which the work was performed, default today. Must be in ISO-8601 format.

comment to add to the task, optional