Java CAP application to upload a parquet file

[Jag03]

Hi Team,
I am new to CAP. I am building a java CAP application with spring boot and ODATA 4.
My requirement is to provide an api to upload a parquet file. The issue is whenever I am making the API call its returning me below error - 

{

"error": {

"code": "406",

"message": "The content type 'multipart/form-data;boundary=--------------------------939382535059353686856461' is not supported."

}

}

Here's my CDS file 

namespace test;

entity Upload {
  file : LargeBinary @Core.MediaType: 'multipart/form-data';
}

 an there is Handler which implements EventHandler.
In regular spring boot app if I accept Multipart file using @RequestParam, it works fine.
Could you please help me to solve this issue?

Thanks