Record Collection in basic JS

I just stuck with it what do they refer as [id] [prop] and [value] here some please help me solve this. Record collection in Javascript(https://www.freecodecamp.org/learn/javascript-algorithms-and-data-structures/basic-javascript/record-collection)

This whole thing is an object
Its been given a variable name collection
It has properties and values

var collection = {
  2548: { //<----- This number is the id
    albumTitle: 'Slippery When Wet',//<-- albumTitle is the property[prop] and 'Slippery When Wet' is the value
    artist: 'Bon Jovi',
    tracks: ['Let It Rock', 'You Give Love a Bad Name']
  }
}

Those are the ones referred to as id, prop and value.

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it seems artist and tracks are also property?

That’s right so that should help you get started.

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Thankyou for your help