Alternative for ENABLE_BROKER in SQL Server

For my ASP.NET MVC web application, to send the push notifications among the users I have used SignalR + Firebase and MS SQL as databases.

I chose to publish this application on Azure Service.

So there, they have a database called Azure SQL.

I chose that option and published my application.

The thing is we can't ENABLE_BROKER service on the Azure SQL database.

So without that service, my application won't run on the service.

I can't disable the push notifications for this system.

Is there any other way to do this? I googled this issue and there are answers that in Azure Management service this option is available but the budget I planned for this system exceeds if I bought management service as my database.

So want to know any alternative that I can go with

Thanks