Carry out the following steps:
Drag-and-drop an
<assign>
activity after the<invoke>
activity namedinvoke_search_web_search
, double-click on it, and go to the Copy Rules tab. Create a new copy rule and then choose$invoke_search_web_service_search_OutputVariable.output
as the From expression and$outputVariable.payload
as the To expression. Then right-click on that copy rule and go to Change rule type and select Append. Then click on Apply and then on OK, as shown in the following screenshot: