Requesting for logic

Certified Associate Developer

I have two values consider type is CDT: 

local!oldData: {
customer: "oldCustomer",
supplier: "ABC"

local!updatedData: {
customer: "newCustomer",
location: "Hyd",
supplier: "DEF"

I want to give response only the updated values like follows:

fieldName: customer
oldValue: oldCustomer,
newValue: newCustomer,

fieldName: supplier,
oldValue: ABC,
newValue: DEF

Can anyone please help me to build logic for it.

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