Robot Framework “multipart/form-data” REST request

Im trying to use this form for the post body request

------WebKitFormBoundary4POLnCIPMmfk10Cb Content-Disposition: form-data; name="category"; filename="blob" Content-Type: application/json

{"name":"multi"} ------WebKitFormBoundary4POLnCIPMmfk10Cb Content-Disposition: form-data; name="file"; filename="ai.png" Content-Type: image/png

------WebKitFormBoundary4POLnCIPMmfk10Cb--