curl --request POST \
  --url https://api.breeze.baby/withdraw/tx \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '{
  "params": {
    "all": true,
    "fund_id": "<string>",
    "payer_key": "<string>",
    "amount": 1,
    "user_key": "<string>"
  }
}'

{
  "success": true,
  "result": "serialized_transaction"
}