core: SmartThings integration does not report contact sensor updates: HTTP_UNPROCESSABLE_ENTITY

Home Assistant release with the issue: 0.94.3

Last working Home Assistant release (if known): Unknown

Operating environment (Hass.io/Docker/Windows/etc.): Hasbian

Component/platform: SmartThings

Description of problem: Door contact sensors from smartthings are not reporting events

Traceback (if applicable):

Additional information:

Try to redo the smartthings integration, ended up in the same situation Lights can be activated from HASS, and Lights also report event state change to HASS