Example of a list item for a Alexa ListTemplate

listItem.json

{
  "token": "cheese1",
  "image": {
    "contentDescription": "desc1",
    "sources": [
      {
        "url": "http://www.example.com/gouda.jpg"
      }
    ]
  },
  "textContent": {
    "primaryText": {
      "text": "Gouda",
      "type": "PlainText"
    },
    "secondaryText": {
      "text": "Serving size: 1oz (28g)",
      "type": "PlainText"
    },
    "tertiaryText": {
      "text": "100 cal",
      "type": "PlainText"
    }
  }
}