curl \
  --request POST \
  --url "https://api.breeze.blue/v1/voice-previews/gvi_01hpreview/save" \
  --header "xi-api-key: $BREEZE_API_KEY" \
  --header "Content-Type: application/json" \
  --data '{
  "voice_name": "Brand Narrator"
}'

{
  "voice_id": "<string>",
  "name": "<string>",
  "category": "<string>",
  "voice_type": "<string>",
  "settings": {
    "guidance_scale": 1
  },
  "labels": {},
  "preview_url": "<string>",
  "description": "<string>",
  "created_at_unix": 123
}