curl --request POST \
  --url https://api.anchorage-staging.com/v2/subaccounts/{subaccountId}/fiat/withdrawals \
  --header 'Api-Access-Key: <api-key>' \
  --header 'Api-Signature: <api-signature>' \
  --header 'Api-Timestamp: <api-timestamp>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "asset": {
    "assetType": "USD",
    "amount": "10.01"
  },
  "customerDetails": {
    "beneficiary": {
      "name": "John Doe",
      "accountNumber": "123",
      "address": {
        "address": "123 Main Street",
        "city": "Windsor",
        "state": "Iowa",
        "zipcode": "12312"
      }
    },
    "financialInstitution": {
      "address": {
        "address": "123",
        "address2": "123",
        "city": "123",
        "zipcode": "123",
        "state": "123"
      },
      "name": "name",
      "id": "123",
      "code": "ABA"
    },
    "memo": "12312312"
  }
}
'

{
  "data": {
    "transactionId": "c4c4652f-0c07-472c-a7f8-955fbe07775d"
  }
}