curl --request POST \
  --url https://api.onstacks.io/v1/wallets/{walletId}/withdrawal/preview \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "network_code": "<string>",
  "asset": "<string>",
  "amount": "<string>",
  "to_address": "<string>"
}
'

{
  "data": {
    "wallet_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "wallet_name": "<string>",
    "network_code": "<string>",
    "network_display_name": "<string>",
    "asset_symbol": "<string>",
    "amount_base_units": "<string>",
    "to_address": "<string>",
    "provider": "<string>",
    "wallet_type": "<string>",
    "blockops_wallet_id": "<string>",
    "available_balance_base_units": "<string>",
    "available_balance": "<string>",
    "from_address": "<string>"
  },
  "error": null,
  "request_id": "<string>"
}