Sticky AMP autorefresh

<amp-sticky-ad layout="nodisplay">
<amp-ad width="320" height="100"
type="doubleclick"
data-enable-refresh="30"
json='{"targeting":{"autorefresh":"30_sec"}}'
data-slot="/45470634/clickio_area_652227_320x100"
data-multi-size-validation="false"></amp-ad>
</amp-sticky-ad>