GET https://api.imbawallet.com/partner/documents/{ext_id}
Authorization: Bearer <access_token>

{
  "ext_id": "withdraw-20260710-001",
  "type": "withdrawal",
  "id": "019d0123-bf52-74b5-b78a-76c49333e82d",
  "status": "processing",
  "updated_at": "2026-07-10T09:21:15.000Z",
  "request_id": "019d0120-7b59-7eab-b837-a7af38ea3db2"
}