curl --request POST \
--url https://api.daya.co/v1/merchant/balance/transfer \
--header 'X-Api-Key: YOUR_API_KEY' \
--header 'X-Idempotency-Key: 550e8400-e29b-41d4-a716-446655440000' \
--header 'Content-Type: application/json' \
--data '{
"amount_usd": "100.00"
}'