Creates a system message or overwrites the existing one.
Basic Authentication used by routes designed for the Management-UI.
The Accept header specifies the media type that the client expects in the response. Available options: application/json, application/hal+json, application/xml, text/xml, text/csv. The default value is application/json.
application/json, application/hal+json, application/xml, text/xml, text/csv The system message was created.