Best way to handle server side inventory management?

I have a multiplayer game that has a player script attached to each player. Within the player script is a Field that holds an instance of my inventory class. This class is a simple data wrapper (no real methods). I also have a inventory buffer which acts as a gui and buffer between mutiple refrences to inventory instances. If im in the editor as a client I can change what is in my inventory from the inspector. This is because I have the inventory object simply attached to the player. I would think that I could create a server only gameobject that holds an array of all of the player inventories, and making the player unable to edit their inventory. Doing it this way would also eliminate players being able to see other players inventories.

However I do not know how I would go about doing this, and I would like to know if there is some way I could easily integrate this functionality into my existing inventory system.

I want to know what code is on my server and what is on the client this would clear up so much. Im used to creating client only code and server only code using node and socket on some multiplayer web games.

If you want to see the inventory code I could post it.