curl --request POST \
  --url 'https://api.stateset.com/api/v1/currencies/rates' \
  --header 'Authorization: Bearer YOUR_API_KEY' \
  --header 'Content-Type: application/json' \
  --data '{
  "base_currency": "string",
  "quote_currency": "string",
  "rate": "string"
}'

{
  "base_currency": "string",
  "quote_currency": "string",
  "rate": "string",
  "updated_at": "string"
}