{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "type": "object",
  "additionalProperties": false,
  "required": ["playerId", "fieldKey", "value", "observedAt", "checksum"],
  "properties": {
    "playerId": { "type": "string", "minLength": 1, "maxLength": 96 },
    "fieldKey": { "const": "855" },
    "value": { "type": "integer", "minimum": 0, "maximum": 100000 },
    "observedAt": { "type": "string", "format": "date-time" },
    "checksum": { "type": "string", "minLength": 1, "maxLength": 160 }
  }
}