curl --request POST \
  --url https://api.joinslash.com/crypto/offramp \
  --header 'Content-Type: application/json' \
  --header 'X-API-Key: <api-key>' \
  --data '{
  "virtualAccountId": "<string>",
  "paymentRail": "ach",
  "currency": "usdt"
}'

{
  "wallet": {
    "id": "<string>",
    "type": "off_ramp",
    "status": "pending_active",
    "subaccountId": "<string>",
    "slashAccountGroupId": "<string>",
    "timestamp": "2023-11-07T05:31:56Z"
  },
  "addresses": [
    {
      "id": "<string>",
      "walletId": "<string>",
      "status": "pending_active",
      "currency": "usdc",
      "chain": "ethereum",
      "address": "<string>",
      "method": "wire",
      "blockchainMemo": "<string>",
      "timestamp": "2023-11-07T05:31:56Z"
    }
  ]
}