Filling Fields of DataType Image via Rest API

Hi everyone,

just curious whether or not it is possible to upload an Image for Fields of DataType: Image using the Rest API.
I tried just sending the image as base64 as the value for the Field in the name_value_list, but this didn’t work.
I know how to create Notes and Upload Images as Attachments to those but I can’t find any Information on how to do this for said Fields.

Is it at all possible at this point?
Would I have to make any changes to our SuiteCRM-System?