fedi:pinned_message
This should be a brief message and will be pinned to the top of the commmunty screen after joining the federation
Note that this is different than the welcome_message
field, which is displayed before joining the federation.
Use this field to provide information to users who have already joined the federation.
Structure
Unicode string HTML formatting is NOT supported
"fedi:pinned_message": "Welcome! Please respect the privacy of others in the community."