{
    "$schema": "http://json-schema.org/draft-04/schema#",
    "description": "10/EPMP update metadata request: a set of EP metadata key-value pairs in JSON object representation",
    "type": "object",
    "minProperties": 1,
    "patternProperties": {
        "^[a-zA-Z0-9_]+$": {}
    },
    "additionalProperties": false
}