curl --request POST \
  --url https://api.example.com/v1/bidder/withdraw_from_windows \
  --header 'Content-Type: application/json' \
  --data '
{
  "window_numbers": [
    1,
    2,
    3
  ]
}
'

{
  "withdraw_responses": [
    {
      "amount": "1000000000000000000",
      "window_number": 1
    },
    {
      "amount": "1000000000000000000",
      "window_number": 2
    },
    {
      "amount": "1000000000000000000",
      "window_number": 3
    }
  ]
}