Hello! 
Network name
Ethereum Mainnet

New RPC URL
https://mainnet.infura.io/v3/

Chain ID
1

Please turn on "Token detection" in your metamask wallet. If it so, then click "Import tokens" -> "Custom token" then paste the PLX contract address "0x0779f0A9e4A8a10111b71b87bFB330AA94a8E223"

Token symbol
PLX

Token decimal
18