A media automation system generates multiple instances of a media broadcast stream, which includes core content common to each of the instances of the media broadcast stream, and multiple spot blocks interspersed within the media broadcast stream. Each stream instance is associated with a particular media playout device. A user notification is received and a packaged user notification is generated for inclusion in a particular instance of the media broadcast stream. Packaging the user notification includes obtaining first account information associated with a media delivery platform account of a user associated with a particular media playout device, and second account information associated with a consumer notification service account of the user. The user notification is mapped to the particular media playout device based on the first and second account information, and the packaged user notification is inserted into a first available spot block of the particular instance of the media broadcast stream.