Send custom message when a new instance is created

Key	Type	Description
message	String	Send this message to player’s chat
title	String	Send this title to player
subtitle	String	Send this subtitle to player
actionbar	String	Send this actionbar to player
duration	Integer	Title’s duration
fade_in	Integer	Title’s fade in
fade_ou	Integer	Title’s fade out

example:

structurekey:
  name: "...."
  #others stuff
  options:
    notify:
      message: "<gray>You've created X structure !"