Serializer vs mutation keys expectation, sync issue

[sanjarcode]

Supose I call a "user contacts" API in my app, the BE sends this.
The keys here we decided by the frontend person for ease in frontend code.

{ id: 59, name: "John Doe", email: "abcdefgmail.com", phone: null }

but it expects the following for a PUT/POST. It expects this because it uses the keys (below) internally in BE

{ id: 59, name: "John Doe", email_address: "abcdefgmail.com", phone_number: null }

problem

Now whotf is going to manage this synching?
This is bad design, and it's not complex bad either.

fix

whats the fix here?