/api/v2/tasks/{id}

Updates a task. Only the provided attributes are modified — rename it via title, change its workflow status via workflow_status_id, reassign via assignee_id, toggle private, or move it to a different task list via task_list_id.
To reorder the task within its task list, use PATCH /tasks/{id}/reposition.
To shift the task and its blocking dependent tasks by working days, use PATCH /tasks/{id}/move_dependent.