{"alerts":[{"type":"hub","severity":"high","message":"Singapore Maritime B2 congestion detected","hub_id":"hub-singapore"},{"type":"hub","severity":"high","message":"Chicago Midwest LX congestion detected","hub_id":"hub-chicago"},{"type":"shipment","severity":"medium","message":"Shipment delay risk for SHP-A1B2C3D4","shipment_id":"SHP-A1B2C3D4"},{"type":"shipment","severity":"high","message":"Shipment delay risk for SHP-I9J0K1L2","shipment_id":"SHP-I9J0K1L2"}]}