public void updateServiceudbyderUsecase() {
    //STEP 1: get serviceudbyder list
    client.replacePath(path + "/serviceudbydere");
    Response responseList = client.get();

    List<XApiITSystemRef> list = readListFromResponse(responseList, XApiITSystemRef.class);

    //STEP 2: get serviceudbyder by UUID
    client.replacePath(path + "/serviceudbydere/"+list.get(2).getUuid());
    Response response = client.get();

    XApiServiceudbyder xApiServiceudbyder = readObjectFromResponse(response, XApiServiceudbyder.class);

    //STEP 3: update serviceudbyder, add new service with a servicesystemrolle
    XApiServiceBO newService = new XApiServiceBO();
    newService.setUuid(UUID.randomUUID().toString());
    newService.setEntityId(EntityIdTestHelper.createServiceEntityId());
    newService.setNavn("Example service" + UUID.randomUUID().toString());
    newService.setBeskrivelse("Test-beskrivelse");
    newService.setVilkaar("Service vilkaar");
    newService.setLinkTilSnitfladebeskrivelse("http://linktilsnitfladebeskrivelse.dk");
    newService.setPreConfigUrl("http://preconfigurl.com");
    newService.setPostConfigUrl("http://postconfigurl.com");
    newService.setUnderstoetterVideregivelseAfData(false);
    newService.setServiceType(ServiceType.FAELLESKOMMUNAL_SERVICE);

    List<XApiServicesystemrolleBO> systemRoller = xApiServiceudbyder.getServiceudbyder().getServicesystemroller();
    SystemRolleRefBO systemRolleRefBO = new SystemRolleRefBO();
    systemRolleRefBO.setUuid(systemRoller.get(0).getUuid());
    newService.setServicesystemroller(toXApiServiceSystemRolleRefList(Collections.singletonList(systemRolleRefBO)));

    xApiServiceudbyder.getServiceudbyder().getServices().add(newService);

    // NOTE: See the file "Serviceudbyder-payload.json" for an example of an actual JSON payload
    client.replacePath(path + "/serviceudbydere/" + xApiServiceudbyder.getUuid());
    Response responseUpdate = client.put(om.writeValueAsString(xApiServiceudbyder));

    XApiServiceudbyder updatedXApiServiceudbyder = readObjectFromResponse(responseUpdate, XApiServiceudbyder.class);
}
