Record Collection JSON exercise for handling incomplete data

RecordCollectionFCC.js

// Setup
var collection = {
    "2548": {
      "album": "Slippery When Wet",
      "artist": "Bon Jovi",
      "tracks": [ 
        "Let It Rock", 
        "You Give Love a Bad Name" 
      ]
    },
    "2468": {
      "album": "1999",
      "artist": "Prince",
      "tracks": [ 
        "1999", 
        "Little Red Corvette" 
      ]
    },
    "1245": {
      "artist": "Robert Palmer",
      "tracks": [ ]
    },
    "5439": {
      "album": "ABBA Gold"
    }
};
// Keep a copy of the collection for tests
var collectionCopy = JSON.parse(JSON.stringify(collection));

function updateRecords(id, prop, value) {
  
  if (!value) {
    delete collection[id][prop];
    return collection;
  } 
  
  if (prop !== "tracks") {
    collection[id][prop] = value;
  } else {
    if (!collection[id].hasOwnProperty("tracks")) collection[id].tracks = []; 
    collection[id].tracks.push(value);
  }  
  
  return collection;
}

// Alter values below to test your code
updateRecords(5439, "artist", "ABBA");