curl --request POST \
  --url https://backend.testeswaffle.org/subscribe \
  --header 'Content-Type: application/json' \
  --data '{
    "email": "usuario@exemplo.com",
    "name": "João Silva",
    "newsletter": "thenews",
    "source": "landing-page",
    "utm_source": "instagram",
    "utm_medium": "social",
    "utm_campaign": "janeiro_2024"
  }'

{
  "success": true,
  "message": "Dados atualizados com sucesso",
  "data": {
    "id": "sub_f8771aaf-6f76-46cb-a95a-bf524a617307",
    "email": "geraldo.mazzini@waffle.com.br",
    "status": "active",
    "created": 1730901809,
    "subscription_tier": "free",
    "subscription_premium_tier_names": [],
    "utm_source": "portal",
    "utm_medium": "",
    "utm_channel": "api",
    "utm_campaign": "",
    "referring_site": "https://thenews.waffle.com.br/",
    "referral_code": "Tq7Hsanmni",
    "stripe_customer_id": "",
    "custom_fields": [
      {
        "name": "[MKT][PI] Recap Mensal",
        "kind": "boolean",
        "value": true
      },
      {
        "name": "estados",
        "kind": "string",
        "value": "PI - Piauí"
      }
    ],
    "referral_id": "f6l55ycb03"
  }
}