| AuthorId | body | string | Yes | The AuthorId field is a string GUID uniquely identifying the Tigris user creating the post. |
| ContextId | body | string | Yes | The Id of the Venue that is the context of a Post. |
| Content | body | string | Yes | This is the message text. |
| MessageType | body | string | No | This is the type of message. 1 (Broadcast), 2 (ActionRequired), 3 (Informational), the default value is 3. |
| Recipients | body | string | No | A comma-separated list of Tigris Ids (Guids). Required for Private Posts. Must be empty for Public Posts. |
| Networks | body | string | No | A comma-separated list of Tigris Ids (Guids). Required for Alerts/System Posts. Must be empty for Public Posts. |
| SystemTags | body | string | No | A comma-separated list of Tag values (strings). All tags created using this list will be of the System TagType. |
| UserTags | body | string | No | A comma-separated list of Tag values (strings). All tags created using this list will be of the User TagType. |
| ExpirationDate | body | string | No | The ExpirationDate is the DateTime (in UTC) indicating the time the post will no longer be viewable. The Default value is Jan 1, 3000. |
| CreatedTime | body | string | No | The CreatedTime is the DateTime (in UTC) indicating the time the post content is created. The Default value is the current DateTime. |
| UpdatedTime | body | string | No | The UpdatedTime is the DateTime (in UTC) indicating the time the post conent was last updated. The Default value is the current DateTime. |
| TagNames | body | string | No | A comma separated list of Tags indicating the Tag Name that are sent with a post. |
| ContentKey | body | string | No | Key associated with post in the resource file. |
| ContentParameters | body | string | No | A comma separated list of parameters associated with the posts in resource file. |
| Url | body | string | No | This is the url to redirect to the correponding post related page. |