Cant get attributes from MQTT sensor

Trying to get attributes from an MQTT topic. The topic (falcon/player/FPP-Master/playlist_details) comes in as:

{
	"activePlaylists" : 
	[
		{
			"currentItems" : 
			[
				{
					"mediaArtist" : "",
					"mediaName" : "Charlie Daniels - The Legend of Wooley Swamp.mp3",
					"mediaTitle" : "",
					"playOnce" : 0,
					"secondsElapsed" : 135,
					"secondsRemaining" : 119,
					"secondsTotal" : 255,
					"sequenceName" : "Legend of Wooly Swamp.fseq",
					"type" : "both"
				}
			],
			"description" : "",
			"name" : "Halloween",
			"repeat" : 1
		}
	],
	"status" : "playing"
}

In my configuration.yml, I’ve got

mqtt: !include mqtt.yaml

and in mqtt.yaml, I’ve got

sensor:
  - name: "FPP-Master Playlist"
    state_topic: "falcon/player/FPP-Master/playlist_details"
    object_id: fpp_master_playlist_objectid
    unique_id: fpp_master_playlist_uniqueid
    value_template: "{{ value_json.status }}"
    # availability: 
    #   - topic: "falcon/player/FPP-Master/playlist_details"
    #     value_template: "{{ value_json.status }}"
    #     payload_available: "playing"
    #     payload_not_available: "who knows"
    json_attributes_topic: "falcon/player/FPP-Master/playlist_details"
    json_attributes_template: "{{ value_json.activePlaylists | to_json }}"

However, when I look at the entity in the developer tools, under Info I only see:
image

On other entities with attributes I get an ‘Attributes’ list under the History, but I can’t seem to get it to show up here. I’ve tried deleting and re-adding the sensor definition, and so far nothing has worked.

Any pointers to where I screwed up would be appreciated…

Got the attributes. Had to set

json_attributes_template: "{{ value_json | to_json }}"