In order to set or delete the footer image, use PUT templates/:id/branding/footer/image and DELETE templates/:id/branding/footer/image.
https://api.passslot.com/v1/templates/:id/branding
			PUT https://api.passslot.com/v1/templates/2/branding
		
{
   "titleText":"Wallet",
   "headerText":"Your Card",
   "bodyTextColor":"#ffffff",
   "footerTextColor":"#ffffff",
   "footerBackgroundColor":"#ffc535",
}
						{
   "titleText":"Wallet",
   "headerText":"Your Card",
   "bodyTextColor":"#ffffff",
   "footerTextColor":"#ffffff",
   "footerBackgroundColor":"#ffc535",
   "footerImage":"http://lh5.ggpht.com/GUv1BNzuC4gghq"
}
					| HTTP Method | PUT | 
| API Version | 1 | 
| Requires Authentication? | Yes | 
| Request Format | JSON | 
| Request Object | Branding Settings | 
| Response Format | JSON | 
| Response Object | Branding Settings |