How can i load my Parameter Entity with Webservice Output data Collections

Dear Support, I have created a Service task, which calls the web service and it returns collection of data's for the following 3 attributes such as Gov ID, AName and EName. I also have a Parameter Entity with the same attributes defined in my data model. I need to load Webservice output collections into the parameter entity dropdown on my User interface. Could you please let me know how it can be done. Thanks Bala