A customization application receives {HEAD ~ a request} to modify a user role for {TAIL ~ an application} 
A customization application receives { HEAD ~ a request } to modify a user role for { TAIL ~ an application }
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL