curl --request GET \
  --url https://api.exchange.coinbase.com/transfers/{transfer_id} \
  --header 'cb-access-key: <api-key>' \
  --header 'cb-access-passphrase: <api-key>' \
  --header 'cb-access-sign: <api-key>' \
  --header 'cb-access-timestamp: <api-key>'

{
  "id": "19ac524d-8827-4246-a1b2-18dc5ca9472c",
  "type": "withdraw",
  "created_at": "2020-03-12T00:14:12.397Z",
  "completed_at": "2020-03-12T00:14:13.021Z",
  "amount": "1.00000000",
  "details": {
    "coinbase_account_id": "2b760113-fbba-5600-ac74-36482c130768",
    "coinbase_transaction_id": "5e697ed49f8417148f3366ea",
    "coinbase_payment_method_id": ""
  },
  "currency": "USD"
}