sample test has been completed RESTful webservice , but i have one doubt where to add transactions

sample test has been  completed RESTful webservice using LR, but i have one doubt where to add transactions  ,can plese guide me.

my scenerio is appointment creation:

EX: Action()
{
    web_rest("Add yms-appointment creation", 
             
    "URL=http://192.168.68.242:8181/ywc-1.0/services/yms/appointment",
    "Method=POST",         
    "ResType=XML",         
    "BodyFilePath=YMS rest.xml",
    LAST);    
    return 0;
     }

my body file path=xml file(here where to add transactions)

Thanks,

Sivanjan BV