/workflow
This method supports retrieving list of the workflow tasks that are assigned to you or a group that you belong to. Items that assigned to a group have a boolean property indicating this as well as a flag to say whether you have it locked.
Directly assigned tasks can be cancelled via the DELETE verb. Whether this is successful depends on project design.
Locked tasks can be unlocked via the PATCH verb.
id, workflow state guid.
assignedDateTime, time that the previous user assigned this task.
assignedBy, user name of the assigning person.
assignedType: Group if this is a group assigned task, otherwise User.
comment, information left by the assigning person.
publishId, id of the form to launch.
locked: true if you have an exclusive lock on the group task.