Yes, this is possible with management plugin. Read the Load definitions at startup.
In short: just put load_definitions
variable set to path to previously exported JSON file containing the definitions you want, something like {load_definitions, "/path/to/json.file"}
.
Note:
that the definitions in the file will overwrite anything already
in the broker; using this option will not delete anything that is
already there. However, if you start from a completely reset broker,
use of this option will prevent the usual default user / virtual host
/ permissions from being created.