JSFiddle - React, Tailwind, and code Playground

JavaScript

var data = {
    "KeyOne": [
        {
            "ObjectPropertyOne": "value",
            "ObjectPropertyTwo": "value",
            "ObjectPropertyThree": "value",
            "ObjectPropertyFour": "value",
        },
        {
            "ObjectPropertyOne": "value",
            "ObjectPropertyTwo": "value",
            "ObjectPropertyThree": "value",
            "ObjectPropertyFour": "value",
        },
        {
            "ObjectPropertyOne": "value",
            "ObjectPropertyTwo": "value",
            "ObjectPropertyThree": "value",
            "ObjectPropertyFour": "value",
        },
    ],
    "KeyTwo": [
        {
            "ObjectPropertyOne": "value",
            "ObjectPropertyTwo": "value",
            "ObjectPropertyThree": "value",
            "ObjectPropertyFour": "value",
        },
        {
            "ObjectPropertyOne": "value",
            "ObjectPropertyTwo": "value",
            "ObjectPropertyThree": "value",
            "ObjectPropertyFour": "value",
        },
        {
            "ObjectPropertyOne": "value",
            "ObjectPropertyTwo": "value",
            "ObjectPropertyThree": "value",
            "ObjectPropertyFour": "value",
        },
    ],
    "KeyThree": [
        {
            "ObjectPropertyOne": "value",
            "ObjectPropertyTwo": "value",
            "ObjectPropertyThree": "value",
            "ObjectPropertyFour": "value",
        },
        {
            "ObjectPropertyOne": "value",
            "ObjectPropertyTwo": "value",
            "ObjectPropertyThree": "value",
            "ObjectPropertyFour": "value",
        },
        {
            "ObjectPropertyOne": "value",
            "ObjectPropertyTwo": "value",
            "ObjectPropertyThree": "value",
            "ObjectPropertyFour": "value",
        }
    ]
}

for (var key in data) { //data being the object
    for (var i = 0; i < data[key].length; i++) {
        console.log(data[key][i].ObjectPropertyTwo);
    }
}