JSON Invalid Number

I’m new to coding and JSON, so this may be a simple issue to fix. I’m creating an Array Variable in Microsoft Power Automate. There are a few lines in my JSON code that have a number in the middle of a string. These lines are throwing an invalid number when I put the code in a validator. The line is:

[
{
“Tracphone”: “@mmst5.tracphone.com”
}
]

Any help to resolve this is appreciated. I think it is something simple that I’m missing.