Upload File to GOS

Hi Experts,

I have requirement to Upload file in GOS object, using O data.

My concern is; how can I get Image data in SAP using Odata.

I am planning to get image data in Base64 format.

So, what Kind of variable should I declare in my Odata Service.

Or should I get data in any other format.

Please help me.

-Regards

Rohit