API Request/Response Model for showing differences in JSON objects

I am writing an API to merge two different JSON Objects. Both of these objects can have same as well different number of properties.

Object 1 :

{
    "name": "Sam",
    "lastName": "Hanks",
    "address":[
        {
            "addressLine1": "123 St.",
            "addressLine2": "xyz avenue",
            "phone": "1231-123-123"
        },
        {
            "addressLine1": "123 Building",
            "addressLine2": "xyx state Apt.",
            "phone": "1234-124-124"
        }
    ],
    "additionalInfo":{
        "age": 23,
        "height":"1.65",
        "weight": 45
    }
}

Object 2:

{
    "name": "Tom",
    "lastName": "Hanks",
    "address":[
        {
            "addressLine1": "123 St.",
            "addressLine2": "xyz avenue",
            "phone": "1231-124-124"
        }
    ],
    "additionalInfo":{
        "height":"1.65",
        "weight": 89
    }
}

These two objects when compared on the basis of properties, name, lastName, address, etc, will have some differences.

I would be getting all these differences in a data structure and will present it to the user as conflicts.

I have the code to get all the differences but I am not able to construct a data model to present it in a graceful way. A way which is readable and also at the same time can be parsed easily again when user resolve the conflict and I contruct a combined object in the next operation.

I have looked at many applications like, diffchecker, to see how they do it, but I am not able get some clue.

Is there a good way to do it using REST APIs ? All I want to know is, how can I represent differences in two json objects in json format.