Possibility to define value on JSON not been converted to string?

[Louis CONVERT]

Hello,

I would like to pass data from my FiPy module to Firebase via Pybytes, using Webhooks. In that case, I'm defining a Webhook with parameters and values coming from the module. But I would like to put timestamps in the data, Firebase allows to put automatically timestamp when using the placeholder

firebase.database.ServerValue.TIMESTAMP

The problem is that in Pybytes, when I put the placeholder as value, it is automatically converted on the JSON as a string with double quotes ("), but then it is not interpreted by Firebase as a placeholder, and stored as string value.

Is there any possibility to define that a value is not a string ?

Or maybe there is a possibility on to define a CUSTOM body with the possibility to add also content type to define that it is JSON ?

Thanks for your help !