Absolutely. I pulled the following from a java step in the getPageJSONActivity in the PegaSample Application, it takes JSON as a string and writes its contents to a page called SamplePage using AdoptJSON(). It then takes the page and converts its content to a string using getJSON().
The easiest way to get the contents into a local string variable if you are using an activity would probably be a property-set. If that is not an option, you can try something like the following, replacing ???? with the name of the property containing the JSON:
SamplePage type is classless in clipboard. You have to copy the value to a property in another page "say pyWorkPage / other page which has class type associated to it (Address(Org-Data-Address))". Then you can map the property to the UI control using correct context page as shown below.
Define Page and Class Name in Pages & Classes as shown below
From your Clipboard structure it looks like you are using a Connector to connect to a Google service, did you already try the JSON response handler?
The screenshot above is a use case in our product, where we are capturing JSON from an external, non PPRC, REST service and mapping it accordingly to a well defined PRPC ClipboardPage.
Otherwise Gowrishankar Ramasamy is correct, the classless-ness of your data is why you can't use it in PRPC with a UI. For situations like this, I have found creating an Activity that references the "SamplePage" ClipboardPage and iterates through the nested structure, setting the only pxObjClass, is sufficient to make the page UI usable again.