Live Nation is facing a multi-million dollar class action lawsuit over the massive Ticketmaster data breach from earlier this year.

In April, a hacker group operating under the name ShinyHunters seemingly accessed Ticketmaster’s database. They allegedly collected 1.3 terabytes of information, including the full names, addresses, emails, phone numbers, and credit card information of up to 560 million customers. In June, Ticketmaster (which operates under Live Nation) confirmed in a federal filing with the SEC they were investigating the attack.

The proposed class action lawsuit accuses Ticketmaster and Live Nation of negligent behavior prior to the breach. It puts forward that Ticketmaster failed to protect its customers’ data and didn’t adequately adopt security measures to prevent such attacks. Additionally, it alleges that Ticketmaster failed to alert users that their data had been compromised in a timely matter.

The lawsuit considers the hack a result of Ticketmaster’s poor data protection procedures,...