Custom Attributes Are Discarded

Hi Guys !. I am trying to integrate a PowerShell script with Sentry but didnt manage to find a suitable library. This lead me to a situation in which I was able to log to sentry but I am not able to structure information the way I want. For instance: I want to send some additional attributes (maybe this could be used some other time to filter events) as tags maybe but they are discarded… As I said, I am building the body request by my own… Also If I include numbers for example to identify the host or some other number like data, then it isnt shown…

So in summary: How could I include custom tags in my events and have number like data not stripped out ?.