curl -X "POST" "https://example.com/upload" \
-H "Accept: application/json" \
-H "Authorization: Bearer ejHj..." \
-H "Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryjt9EifFdUkYVAkki" \
-F 'image=@"test_out.png"' \
-x http://127.0.0.1:8080
...
----WebKitFormBoundaryjt9EifFdUkYVAkki
Content-Disposition: form-data; name="image"; filename="test_out.png"
...