という知らせを

the news that

→ と
phrase Rare #29,017
the news that Used before verbs such as 受ける, 聞く, and 聴く to indicate receiving or hearing news about the preceding clause. という introduces the content of the news, and を marks it as the object of the verb.
JA: 友達が結婚したという知らせを聞いた。
EN: I heard the news that my friend got married.

彼が試験に失敗したという知らせをうけた

I received the news that he had failed the exam.

私たちはあなたが無事に着いたという知らせを心待ちにしている

We’re eagerly awaiting word that you arrived safely.