Use JSON schema check on POST request with WireMock - json

Question

I'm using WireMock (Docker) docker.io/rodolpheche/wiremock:2.27.2-alpine. I set it up via Docker Compose and everything works flawlessly.
I'm trying to set up a stub/mapping to check the JSON input against the corresponding JSON schema. Basically, this is the stub/mapping:
{
"name": "Create Character Stub",
"request": {
"headers": {
"accept": {
"caseInsensitive": true,
"equalTo": "application/json"
},
"content-type": {
"caseInsensitive": true,
"equalTo": "application/json"
}
},
"method": "POST",
"url": "/api/characters",
"body": {
// [start] I made this up, but that's what I'm trying to achieve
"type": "JSON_SCHEMA",
"location": ""schemas/create-character.json""
// [end]
}
},
"response": {
"headers": {
"location": "{{ request.path }}/{{ randomValue type='UUID' }}"
},
"status": 201,
"transformers": ["response-template"]
}
}
...and this is (an excerpt of) the JSON schema:
{
"$schema": "http://json-schema.org/draft/2019-09/schema#",
"type": "object",
"description": "Character entity",
"properties": {
"first_name": {
"type": "string",
"description": ""
},
"last_name": {
"type": "string",
"description": ""
},
"age": {
"type": "number",
"description": ""
}
},
"additionalProperties": false,
"required": ["first_name", "last_name", "age"]
}
Is there a way to accomplish this with WireMock? I've been searching for something like that for a while. The closer I've found is to use JSON path, but that's not quite the same as checking for a proper schema — and could be tedious task with long JSON requests.
I searched through the issues in the WireMock's GitHub repository, but I can only see this one (closed by the way). Still, I don't see a way to do exactly what I'm looking for. I just have as input a JSON schema.