Send files from bot framework composer in binary format to Azure DevOps API

I am new to Bot Framework composer. I need help to send files from bot framework to azure DevOps through API. Azure Devops API uses binary file data in body with cotent-type : application/octet-stream. I can send files through Postman to Azure DevOps Api. But same is not possible through BOT Framework Composer, Please refer below BOT Framework composer screen shots -Image of File Input and image of HTTP request through Web API. File are getting created in WorkItems but that all files are corrupted one. Please suggest how to pass binary file data in Body of HTTP Request using Bot Framework Composer.