curl --request GET \
  --url https://api.sandbox.sardine.ai/v1/fiat-currencies \
  --header 'Authorization: Basic <encoded-value>'

{
  "response": {
    "symbol": "<string>",
    "supportingCountries": [
      "<string>"
    ],
    "name": "<string>",
    "paymentOptions": [
      {
        "name": "<string>",
        "id": "<string>",
        "processingTime": "<string>",
        "displayText": true,
        "icon": "<string>",
        "dailyLimit": 123,
        "maxAmount": 123,
        "minAmount": 123,
        "weeklyLImit": 123
      }
    ]
  }
}