The content of dsplay_template must be defined by you (template creator).

// All fields here are custom and template specific
var dsplay_template = {
  my_color: '#FF4477',
  my_image: '/path/to/image',
  my_flag: 'true', // boolean

remember to register the variables defined in dsplay_template as “Template Vars” in the template creation form (on DSPLAY Web Manager), informing the same name and type