Business Events against subscription product line updates

Hi Team

We would like to leverage a feature if provisioned in subscription where there are business events raised for any update that happens at the product line alone. Currently we have Business events which listen to updates at the header level only- Create/Update/Event and we would like to have it extended to product line as well.

SO in a case, when a product line gets updated without any update to the header, then the subscription business event should get triggered.