curl --request POST \
  --url https://api.copper.co/platform/blockchain/validate-address \
  --header 'Content-Type: application/json' \
  --data '{
  "address": "<string>",
  "currency": "<string>",
  "mainCurrency": "<string>",
  "memo": "<string>"
}'

{
  "address": "<string>",
  "currency": "<string>",
  "mainCurrency": "<string>",
  "memo": "<string>",
  "valid": true
}