``` post: tags: - "Voucher" summary: "Free shit" description: "No money needed!" operationId: "uploadVoucher" requestBody: description: "File to upload" content: form-data: schema: properties: file: description: "The file to upload" type: "string" format: "binary" type: "object" ``` ``` Error: UnexpectedFormat("unexpected content type: form-data") ```