Parsing the JSON Alexa Intents Sent to HA using Variables

How can I use the JSON input that Amazon Alexa passes to HA Intents?

Background:
I’ve got the Amazon Developer Skills side setup with a TurnOn and TurnOff intent along with a switch slot and a light slot. The switch slot has my various zwave switches as values and some synonyms configured. I can successfully get Alexa to turn on a single switch using the following code:

TurnOn:
   action:
      service: switch.turn_on
      data:
         entity_id: switch.garage_switch
   speech:
      type: plain
      text: OK

Unfortunately with my current understanding/experience I would need to create a separate intent per switch in the Amazon Developer area similar to TurnOnGarage and TurnOnBedroom. When I try to use a variable HA errors out with not being able to use “extra keys” in the entity_id. What I’ve tried to do is just use a variable of some kind to substitute for the entity_id such as:

TurnOn:
   action:
      service: switch.turn_on
      data_template:
         entity_id: {{ value_json.resolutionsPerAuthority[].values[].value.name }}
   speech:
      type: plain
      text: OK

where the entity_id is what is in the JSON that Alexa is sending to my HA.

"request": {
		"type": "IntentRequest",
		"requestId": "amzn1.echo-api.request.REDACTED",
		"timestamp": "2019-03-10T17:15:43Z",
		"locale": "en-US",
		"intent": {
			"name": "TurnOn",
			"confirmationStatus": "NONE",
			"slots": {
				"light": {
					"name": "light",
					"confirmationStatus": "NONE"
				},
				"switch": {
					"name": "switch",
					"value": "garage",
					"resolutions": {
						"resolutionsPerAuthority": [
							{
								"authority": "amzn1.er-authority.echo-sdk.amzn1.ask.skill.REDACTED.switch",
								"status": {
									"code": "ER_SUCCESS_MATCH"
								},
								"values": [
									{
										"value": {
											"name": "switch.garage_switch",
											"id": "REDACTED"
										}
									}
								]
							}
						]
					},
					"confirmationStatus": "NONE",
					"source": "USER"
				}
			}
		}
	}
}

Is what I’m trying to do possible/practical or is there a better way to accomplish getting Alexa to turn on individual switches without hard coding an Alexa intent for each one?

Hi there,

Did you ever find a solution for this? I want to be able to set IDs in the alexa console and use those in the template of the response in the HA config. If not, did you find a workaround?