Nested API response

folders.json

[
    {
        "id": "fc109bae-368a-449a-854a-ab3021f6ca7a",
        "name": "Business",
        "userId": "3e78a2a7-d2f4-4c4a-9502-4b55f3591e04",
        "parentId": "434d5cfe-846a-4656-8494-85b233bd9b6d",
        "hierarchyLevel": 2,
        "createdAt": "2019-07-02T14:13:34.000Z",
        "updatedAt": "2019-07-02T14:13:34.000Z",
        "children": []
    },
    {
        "id": "f56fc209-a085-4b91-b426-7f5f4a952dbc",
        "name": "Personal",
        "userId": "3e78a2a7-d2f4-4c4a-9502-4b55f3591e04",
        "parentId": "434d5cfe-846a-4656-8494-85b233bd9b6d",
        "hierarchyLevel": 2,
        "createdAt": "2019-06-29T20:48:15.000Z",
        "updatedAt": "2019-06-29T20:48:15.000Z",
        "children": [
            {
                "id": "4d627534-b6de-4538-9d65-37df61ce29f4",
                "name": "Cats",
                "userId": "3e78a2a7-d2f4-4c4a-9502-4b55f3591e04",
                "parentId": "f56fc209-a085-4b91-b426-7f5f4a952dbc",
                "hierarchyLevel": 3,
                "createdAt": "2019-07-03T16:47:21.000Z",
                "updatedAt": "2019-07-03T16:47:21.000Z",
                "children": [
                    {
                        "id": "36fead30-9dee-4561-aca8-9b3da4605d16",
                        "name": "Strays",
                        "userId": "3e78a2a7-d2f4-4c4a-9502-4b55f3591e04",
                        "parentId": "4d627534-b6de-4538-9d65-37df61ce29f4",
                        "hierarchyLevel": 4,
                        "createdAt": "2019-07-03T16:47:57.000Z",
                        "updatedAt": "2019-07-03T16:47:57.000Z",
                        "children": []
                    }
                ]
            },
            {
                "id": "81f8a141-045e-40fc-909d-4970d775415d",
                "name": "Gardening",
                "userId": "3e78a2a7-d2f4-4c4a-9502-4b55f3591e04",
                "parentId": "f56fc209-a085-4b91-b426-7f5f4a952dbc",
                "hierarchyLevel": 3,
                "createdAt": "2019-07-03T16:46:51.000Z",
                "updatedAt": "2019-07-03T16:46:51.000Z",
                "children": []
            }
        ]
    }
]