If another user creates a topic and grants you permissions to publish messages, you can publish text or JSON messages to the topic.
You have obtained the URN of the topic granted to you. For details about obtaining the URN of a topic, see Creating a Topic.
The SMN console is displayed.
Clicking beside Topic URN only enables you to select a topic you created, instead of a topic that you are granted permissions to.
For more details, see Publishing a Text Message and Publishing a JSON Message.