Assigning Nurse in Service Request

Good afternoon!
I would like to know how can I register a nurse that only put the datas in Service Request for doctors?
I think I shouldn’t use the requester and performer, so, what do I need to use?

In HL7 language, this is a ‘data enterer’. We don’t have an element for this in ServiceRequest; we look for that information to go in a Provenance resource that contains information about the request. If you want to denormalise this into the ServiceRequest resource, like Author, then you’d need an extension

Thanks dear.
So I will use it.