Zoho Creator File Upload API

Zoho Creator File Upload API

Hello Zoho community!

I'm having trouble with uploading a file into a zoho record. I've checked this post out  https://help.zoho.com/portal/community/topic/upload-image-file-via-creator-api-from-ios-app but it seems like I'm doing everything correctly. He uses Apple's NSData of the image, but I'm using Base64. I'm getting back a success response too. 

  1. <response>
        <result>
            <form name="Sign_Up">
                <fileupdate>
                    <values>
                        <field name="Photo_ID">
                            <value>/test.png</value>
                        </field>
                    </values>
                    <status>Success</status>
                </fileupdate>
            </form>
        </result>
    </response>
Everything went through? These are the params I'm feeding to it:



And the URL from the documentation:

The base64 is converting back to the image when I test it and I've tried data:image/jpeg;base64 in front of the string. What should I put for file?