django-rest-hooks is a complete solution that requires only a handful of configuration tasks:
'rest_hooks'to installed apps in settings.py.
This Rails library offers a similarly simple sample application for Ruby on Rails that you can use when designing your application.
This application provides a demonstration of using RESTHooks in conjunction with a Sails based CRM application that leverages Waterline ORM's Lifecycle Callbacks to notify subscriptions. You can find the relevant documentation to get started here.