def _make_fake_message(self, user_id, page_id, payload):
event = {<EOL>'<STR_LIT>': {<EOL>'<STR_LIT:id>': user_id,<EOL>},<EOL>'<STR_LIT>': {<EOL>'<STR_LIT:id>': page_id,<EOL>},<EOL>'<STR_LIT>': {<EOL>'<STR_LIT>': ujson.dumps(payload),<EOL>},<EOL>}<EOL>return FacebookMessage(event, self, False)<EOL>
Creates a fake message for the given user_id. It contains a postback
with the given payload.