curl --request POST \
  --url https://api.fluents.ai/v1/voices/update \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "label": "My Voice",
  "description": "This is a description",
  "type": "voice_azure"
}'

{
  "id": "550e8400-e29b-41d4-a716-446655440000",
  "user_id": "550e8400-e29b-41d4-a716-446655440000",
  "label": "My Voice",
  "description": "This is a description",
  "type": "voice_azure"
}