curl --request GET \
  --url https://app.manuscritten.com/api/public/campaigns \
  --header 'X-API-KEY: <api-key>'

{
  "campaigns": [
    {
      "id": "7f127892-71ab-45a6-9145-3565848b55ab",
      "name": "Bienvenida nuevos clientes",
      "variables": [
        {
          "name": "Canal Previo",
          "maxSize": 40,
          "defaultValue": null,
          "example": "LinkedIn"
        }
      ]
    }
  ]
}