output.json

{
  "graph": {
    "label": "Some Title",
    "metadata": {
      "id": "uc1"
    },
    "nodes": [
      {
        "id": "user",
        "label": "User",
        "metadata": {
          "type": "io",
          "trust-boundary": "home"
        }
      },
      {
        "id": "withings",
        "label": "Withings",
        "metadata": {
          "type": "function",
          "trust-boundary": "internet"
        }
      }
    ],
    "edges": [
      {
        "source": "user",
        "relation": "flow",
        "target": "withings",
        "label": "The operation.",
        "metadata": {
          "operation": "The operation.",
          "data": "The data.",
          "threats": [
            "xss",
            "stolen-password"
          ]
        }
      }
    ]
  }
}