How to Create a Sensor from a JSON Attribute of Another Sensor

Configuration
1

I have a sensor where the Attributes is a JSON list.
My end goal is to create multiple picture-entity cards that look like this:

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Please note, these will change over time, so I can’t just hard code them.

From my (limited) understanding, I need to create new sensors template as I have for other items. EG:

- platform: template
  sensors:
    discogs_random_label:
      friendly_name: 'Label'
      value_template: "{{ state_attr('sensor.discogs_random_record', 'label') }}" 
      icon_template: mdi:tag-text-outline

The problem I have though is that the Attribute is a JSON list, not simply defined attributes. I am new, and just can’t seem to find a solution.

Here are some specifics:
Entity: sensor.spotifyplaylist
State: 20
The State is the max number of playlists returned, but could be less.
Attributes:

Have a nice Day!: {
  "name": "Have a nice Day!",
  "image": "https://mosaic.scdn.co/640/7db1407da1e265072b519ce816b743e4026c9b1180a1ff1574dbbd1d5a722b03395df8e5b9d41ab4dae8ad17a47a3563b770beb3a1b85fce0e7b6089eb669772a583cba3fac0a9d5368bcdf3cb6a6fff",
  "uri": "spotify:playlist:1YjGrJLxSUBCPlDkuq7Il1",
  "id": 0
}
Ashtons Favourites: {
  "name": "Ashtons Favourites",
  "image": "https://mosaic.scdn.co/640/03bcf9d313e2f4c9eb331b6d6ae812c7602833f0bc1fb3236c8f9f88bf83063a03447b2e2b9b5528d2aad28ac0748c98424bf2978edc831adcc69117e84239e07a597daad130bc9d4a6bd84e994a22d0",
  "uri": "spotify:playlist:1pZkysYdjVrHjGp8nEFo6N",
  "id": 1
}
Your Time Capsule: {
  "name": "Your Time Capsule",
  "image": "https://lineup-images.scdn.co/time-capsule_DEFAULT-en.jpg",
  "uri": "spotify:playlist:37i9dQZF1E4ZQbd48I4yBG",
  "id": 2
}
Our Wedding Songs: {
  "name": "Our Wedding Songs",
  "image": "https://pl.scdn.co/images/pl/default/f5155633b43a1394fb4da2851df38cc35ac5a8dc",
  "uri": "spotify:playlist:4VA0a7W8CUXSZ3BzewWYEI",
  "id": 3
}
Discover Weekly: {
  "name": "Discover Weekly",
  "image": "https://pl.scdn.co/images/pl/default/d4999304de229a1795efe3f87638ec56e3cd3dd0",
  "uri": "spotify:playlist:37i9dQZEVXcJay8PkejUec",
  "id": 4
}
Covers: Upbeat: {
  "name": "Covers: Upbeat",
  "image": "https://mosaic.scdn.co/640/25c85bf20c80a867fd06a5d1dfcba7d1f6b0ffb1a33989fb7bda76d58f6fea39fb10d575b893310bbb4a00627743eee54cd5800015bb2ec98208f7fabd28d922bf92212116c9870161b3876f43f5550b",
  "uri": "spotify:playlist:4KavIwXiyfmGEM4EcwWbzZ",
  "id": 5
}
Covers: Easy Listening: {
  "name": "Covers: Easy Listening",
  "image": "https://mosaic.scdn.co/640/02a418214b1f4b6dfeea559c80d8c52e534090835d76d3e0d86599ad60600f11647335ef65239ea78cab04a83bd4f866b5b0132996a5577d13226625d697053ca89058889da2ddfff6b61566be4c97c8",
  "uri": "spotify:playlist:3Ge8E6bhNUPssxgUPTiRg9",
  "id": 6
}
Starred: {
  "name": "Starred",
  "image": "https://i.scdn.co/image/4460bf377e42ca2b223f86d7dd4a8f70d896f662",
  "uri": "spotify:playlist:6I6MQz0Qo34lro623EDd8r",
  "id": 7
}
Acoustic Covers: {
  "name": "Acoustic Covers",
  "image": "https://pl.scdn.co/images/pl/default/5464712275c214038ec6ce063075c77539270e1f",
  "uri": "spotify:playlist:37i9dQZF1DWXmlLSKkfdAk",
  "id": 8
}
friendly_name: SpotifyPlaylist
icon: mdi:spotify

Ideally, it would be great if I could somehow create the correct amount of sensors as per the JSON file using the JSON id. However, I would be happy with manually creating a sensor for a set amount. I imagine my new sensors would be named: sensor.spotifyplaylist_0 sensor.spotifyplaylist_1 sensor.spotifyplaylist_2 …

I hope this makes sense. I am sorry if this is an easy question, but my searches have come up empty, and I just can’t get my head around documentation.

2

I don’t have a Spotify integration so I can’t test if this will work or not. But to get the image for the playlist, I think you need to set up your template sensor like this:

- platform: template
  sensors:
    spotifyplaylist_0:
      friendly_name: "Have a nice Day!"
      value_template: '{{ states.sensor.spotifyplaylist.attributes["Have a nice Day!"]["uri"]}}'
      entity_picture_template: '{{ states.sensor.spotifyplaylist.attributes["Have a nice Day!"]["image"]}}'