How to synchronize web application state?

Question

Data synchronization

I am developing a SPA on React, in which interaction with the server takes place via Websocket. To manage the state, react-redux is used, that is, the state can be expressed in JSON text of some size. Is there a general way to keep this state in sync between the server and clients (which are few) at an acceptable speed? Now, for each action, a message is sent to the server, which sends a new part of the state as a response. With this approach, it turns out that for each interaction I need to register:
1) the message to be sent;
2) message processing by the server;
3) response format;
4) response processing by the client side.
I would like to "stupidly" call "syncMyRide" instead. Is this even possible? Obvious problems are conversion to and from JSON and validation.