Send broadcast messages to the members of your Ning Network
- subject (string) [Read/Write]
- Subject of the broadcast message
- body (string) [Read/Write]
- Body of the broadcast message
- messageId (string) [Read/Write]
- Unique string within the target site. The purpose of this property is to prevent the accidental sending of duplicate messages. Currently the API checks for duplicates within the past five minutes. If a duplicate is detected a 4xx error response is returned.