still showing default after i change the json file

here is what i put, please look and see what i messed up:

{
"WaitIntervalInSeconds": 20
}
{
"Welcome": "[#cyan]Welcome to ThugJitsuGamers Rust {0}![/#]
\n[#cyan]It is RUST, but be respectful[/#]
\n[#cyan]The main rule of this server is that we will not tolerate is RACISM[/#]
\n[#cyan]Please visit http://www.thugjitsugamers.us[/#]"
}

Combine the lines into a single line, should resolve it.

{
	"Welcome": "[#cyan]Welcome to ThugJitsuGamers Rust {0}![/#]\n[#cyan]It is RUST, but be respectful[/#]\n[#cyan]The main rule of this server is that we will not tolerate is RACISM[/#]\n[#cyan]Please visit http://www.thugjitsugamers.us[/#]"
}​

made it 1 line, still didnt change, just gave me the Welcome to the server PinkFloyd

What file are you changing this under? You'd need to be changing it under oxide/lang/en/WelcomeMessages.json, not pasting it yourself into the config file.