Referencing Json Type Attribute

I have a script attribute below that holds information for cards:

GameplayManager.attributes.add('cardHandler', {
    type: 'json',
    schema: [
        title: 'spawnObject',
        type: 'asset',
        assetType: 'template'
        title: 'Card Name',
        name: 'cardName',
        type: 'string',
        default: 'enterCardName'
        name: 'cardValue',
        type: 'number',
        default: 0
    array: true

Once I have those filled out, is there a way to instantiate each of those individually and if so how do I reference them?

Any help would be appreciated!

You can iterate through the script attribute array and instantiate an instance from the template asset. Once the instance is created, you can set the card values to whatever you need to on the instance.