curl --request POST \
  --url https://realtime-api.voiceflow.com/v1/stable/evaluation \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "type": "boolean",
  "truePrompt": "<string>",
  "falsePrompt": "<string>",
  "name": "<string>",
  "prompt": "<string>",
  "enabled": true,
  "description": "<string>"
}
'

{
  "evaluation": {
    "id": "<string>",
    "name": "<string>",
    "prompt": "<string>",
    "default": true,
    "enabled": true,
    "projectID": "<string>",
    "settings": {
      "realtime": {
        "voice": "<string>",
        "eagerness": "<string>"
      },
      "maxTokens": 123,
      "temperature": 123
    },
    "averageCost": 123,
    "description": "<string>",
    "type": "boolean",
    "truePrompt": "<string>",
    "falsePrompt": "<string>"
  }
}