I'm creating a notification with template params "button0_surface, button0_label, button0_params".  Button0_params is a json encoded set of params to direct users to a specific experience which matches the notification.

Unfortunately, it appears that the actual link that the user gets sent to when clicking the button is maleformed.  I get:

http://profile.myspace.com/Modules/Applications/Pages/Canvas.aspx?appId=104682&appParams={&canvas_source=appnotification

But the template params I used was:

'templateParams'    => array(
                'button0_surface'    => 'canvas',
                'button0_label'        => _('Check it out'),
                'button0_params'    => json_encode(array(
                    'z_page'    => 'inbox',
                    'from'        => 'flirt-self-notification'
                ))
            )

It looks like our button params are stripped out, and replaced with maleformed json. 

 Bump. Can anyone look at this?

Ok well, didn't get a response.

To spare others hitting this issue and burning 6 hours of hacking on this, I finally figured out you have to urlencode json parameters.

 Works now.