How do I modify instance variables out of the game?

Hello,

I'm looking for help about instance variables, how to these work at low level?

My problem is that I save the Json format of some objects saved in a server and often I need to change values server-side.

I noticed that when I save the Object.AsJSON its variables change name in a (I suppose) totally randomic long number.

I need to understand how to modify values of those variables from my server but I can't if variables' names are unreliable, how does the value get calculated and how often?

Its meant to be a save state, it's not designed to work with external modification.

One of the third party plugs for json would be better, as a separate file.

Its meant to be a save state, it's not designed to work with external modification.

One of the third party plugs for json would be better, as a separate file.

Maybe I got a solution but don't know if it will work, if I make a behavior with properties equal to the variables I need, when I save the state of the object as Json, will these proprties change their names as instance variables do?