curl --location --request PATCH 'https://service1.exmaple.com/orgs//announcement' \
--header 'Content-Type: application/json' \
--data '{
"announcement": "Very **important** announcement about _something_.",
"expires_at": "2021-01-01T00:00:00.000+00:00",
"user_dismissible": false
}'{
"announcement": "Very **important** announcement about _something_.",
"expires_at": "2021-01-01T00:00:00.000+00:00",
"user_dismissible": false
}