curl --request POST \
  --url https://api.dooki.com.br/v2/{alias}/catalog/flags \
  --header 'Content-Type: application/json' \
  --header 'User-Secret-Key: <api-key>' \
  --header 'User-Token: <api-key>' \
  --data '{
  "name": "Dia dos Namorados",
  "active": true,
  "is_visible": true,
  "image_url": "https://example.com/image.png",
  "text_color": "#FFFFFF",
  "background_color": "#000000"
}'

{
  "data": [
    {
      "id": 123,
      "active": true,
      "is_visible": true,
      "name": "Coleção 2017",
      "slug": "colecao-2017",
      "total_products": 123,
      "text_color": "#ffffff",
      "background_color": "#000000",
      "image_url": "https://image.com/selo.gif"
    }
  ]
}