<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def paste_traceback(self, request, traceback):
 """Paste the traceback and return a JSON response."""

        rv = traceback.paste()
        return Response(json.dumps(rv), content_type='application/json')