How to merge objects by removing duplicate keys in node js

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Node.js

Hi,
I have below two objects which I want to merge.

[
    {
        "response_code": 1,
        "response_message": [
            {
                "a": 1000,
                "b": 1000001,
                "c": 10000002
            }
        ]
    },
    {
        "response_code": 1,
        "response_message": [
		"p": 1000,
                "q": 1000001,
                "r": 10000002
	]

    }
]

I want to merge them like below by having only one value of response code and merge values of response message like below way.

{
    "response_code": 1,
    "response_message": [
        {
                "a": 1000,
                "b": 1000001,
                "c": 10000002
            },
        {
            "p": 1000,
                "q": 1000001,
                "r": 10000002
        }
    ]
}

I am not able to do it.

What I have tried:

Really stuck with such complicated merging where I want only once the value of response code and merge the values of response message.