pageElement
Selector or xpath of main content which need to insert, you can let it to be a array to contains multiple page elements. You may leave it empty because it will be generated automatically.
Example1:
"pageElement": ".Context>.Article"
Example2:
"pageElement": [
".Context1>.Article",
".Context2>.Article",
".Context3>.Article"
]
When there are multiple nextLinks and multiple pageElements on one page, you can use a array to include all of them. And switch them by click "switch next link".