/?song=amazing-grace&ref=song-page

{
    "song": {
        "slug": "amazing-grace",
        "title": "Amazing Grace",
        "description": "The best-loved hymn, for 2 to 4 singers: the soprano sings the melody, the alto moves beneath it, the bass holds the roots on \"oo\", and the tenor fills the chord. A gentle first harmony.",
        "difficulty": "beginner",
        "genre": [
            "hymn",
            "gospel"
        ],
        "parts": [
            {
                "key": "soprano",
                "name": "Soprano",
                "low": "D4",
                "high": "D5"
            },
            {
                "key": "alto",
                "name": "Alto",
                "low": "B3",
                "high": "B4"
            },
            {
                "key": "tenor",
                "name": "Tenor",
                "low": "G3",
                "high": "C4"
            },
            {
                "key": "bass",
                "name": "Bass",
                "low": "G2",
                "high": "D3"
            }
        ],
        "previewUrl": null,
        "previewType": "audio/mp4",
        "words": [
            "Amazing grace, how sweet the sound",
            "that saved a wretch like me.",
            "I once was lost, but now am found,",
            "was blind but now I see."
        ],
        "credits": [
            "Words: John Newton (1779)",
            "Tune: \"New Britain\", American folk hymn (1829)"
        ],
        "plus": false,
        "freeThisMonth": false,
        "pageUrl": "https://beta.stackapella.com/songs/amazing-grace",
        "startUrl": "/?song=amazing-grace&ref=song-page"
    }
}