Change Shipment Start Time upon Agent Action

Need To Change Shipment Start Time with sys date once secure resource action is done, I already made DSU but End Time didn't update as a result.

Need To Change Start time and as a result End Time Changes automatically according to defined Lane.

Example

shipment start time was 1/1/2000 1:00 and End Time was 1/1/2000 7:00 (Difference 6 Hrs)

The Req is when secure resource action is made start shipment time updated to sys date 1/1/2000 3:00 and End Time 1/1/2000 9:00 (Same Difference 6 Hrs) using Automation Agent

There is already change start time action in shipment but didn't find in Automation Agent Actions.