Are Custom Properties of Service Bus (Connector) Message in Logic App Always Parsed As String Value?

I am trying to send integer values in custom properties of a service bus (connector) message in logic app but the issue is that the value is automatically parsed to String value even if I pass a number in JSON object. For Reference -

The JSON object that I am trying to pass is -

{
"DemoNumber": 2

}

but here 2 is getting parsed as string at service bus side, The issue is that the connector treat the text as string in spite of providing numeric  values.

The link that I followed for the reference to use properties as {key: value} pair and possible types of values are-

https://learn.microsoft.com/en-us/connectors/servicebus/#send-message

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