def METHOD_NAME(self):
    # Augment with the requisite URLs
    self.ActivityURLs = {svc: {} for svc in self.PendingDeletions.keys()}
    for svc_id, urls in self.ActivityURLs.items():
        svc = Service.FromID(svc_id)
        for upload in self.PendingDeletions[svc_id]:
            try:
                urls[upload] = svc.UserUploadedActivityURL(upload)
            except NotImplementedError:
                pass
    self.PendingDeletionCount = sum([len(v) for k, v in self.PendingDeletions.items()])
    dthandler = lambda obj: obj.isoformat() if isinstance(obj, datetime.datetime)  or isinstance(obj, datetime.date) else str(obj)
    return METHOD_NAME.dumps(self.__dict__, default=dthandler)