Management protocol doesn't support string-based request IDs

The spec supports string-based IDs, however the server does not respond when a string-based ID is sent.

An identifier established by the Client that MUST contain a String, Number, or NULL value if included. If it is not included it is assumed to be a notification. The value SHOULD normally not be Null and Numbers SHOULD NOT contain fractional parts

Sending {"id":"test","method":"minecraft:players"} causes the server to not reply.