Can someone tell me how to add an adaptive card to a task? I set the attachment type to card as shown on the UI: https://developers.ringcentral.com/api-reference/Tasks/createTaskNew 
but it does not accept the CardID which has been returned from my POST:
https://platform.ringcentral.com/team-messaging/v1/chats/$RINGCENTRAL_CHAT_ID/adaptive-cards"