Facebook Open Graph - Did Not Specify Reference Object?

THis is a very newbie question about facebook open graph. I did the tutorial and have no problem create new namespace with new verbs and new nouns. However, I can't get a simple

Solution 1:

message: "The action you're trying to publish is invalid because it does not specify any reference objects. At least one of the following properties must be specified: object."

You are trying to post your object to like as recipe – but the parameter name has to be object instead …