title: (translated) title of the push notification, limited to 50 characters and auto-truncateddescription: (translated) body text of the push notification, limited to 140 characters and auto-truncatedurl: the url that should be opened, in most cases a universal deeplink to a specific entity in the Spencer app (e.g. https://delighter.spencer.app/news/1234)title and description are language specific, and they must be provided in a translations array.target attribute defines to whom the notification is sent:all: send to everyone in the organizationusers: send to a specific list of users in recipients, indicated by a specific identifier key user_identifier (e.g. external_id)user_lists: send to one or more Spencer userlists in user_liststype defines the push notification topic.type (and who are part of the target of course).target for defining the target audiencetype for selecting the push notification topic