Provenance Resource is Mandatory in Payer to Payer Exchange Implementaion

Hi All,
We are developing a service for Payer to payer exchange using Pdex IG there we came across a resource called provenance is it mandatory to maintain Provenance resource for payer to payer implementation or we are good on FHIr standars without even creating Provenance.

Help much appreciated.Thanks

Regards
Priyanka