Hi @nitin.a.agarwal - Keeping the messages in a Message oriented middleware AKA MOM (in this case UM) for another transaction that might come later is not a good design.
MOM/UM is not a database, but provides a loosely coupled way to share data between two different systems asynchronously.
Better to store the data in a datastore from which you can query by transaction id for the later system to make HTTP call.
#webMethods#um#Integration-Server-and-ESB#jms