We are using /POST / PUT operation sending fhir resources as Patient, Encounter, … When we receive such resource on the server side , we need to know the origin system , organization etc which is sending such resource to us.
We have seen fhir MessageHeader resource which contains such info, but its use force to use Bundle (with a MessageHeader and a Patient for instance) so we need to change all the apps which are using /POST /PUT … with simple resources.
Is there any fhir standard way to manage this without using bundle ? Maybe some http header or any other alternative