The CreateSlackAction input includes various settings.

Table: CreateSlackAction

viewNamestringyes Name of the view of the action.
namestringyes Name of the action.
urlstringyes Slack webhook URL to where request is to be sent.
fieldsSlackFieldEntryInputyes Fields to include within the Slack message. Can be templated with values from the result (see SlackFieldEntryInput Table).
useProxybooleanyes Defines whether the action should use the configured proxy to make web requests.

[a] Some arguments may be required, as indicated in this column. For some fields, this column indicates that a result will always be returned for it.