JSON:
{{
"Permission Name": "welcomemusic.use",
"Need Permission": true,
"Music URL": "[URL]https://yourwebsite.com/music.mp3[/URL]",
"Music Duration": 15.0,
"Music Delay": 5.0,
"Only first join the server": false,
"Welcome Message (Empty = No Message)": "Welcome To Our Server, Now playing music for you~"
}}