{
    "$schema": "http://json-schema.org/draft-04/schema#",
    "properties": {
        "checksums": {
            "description": "A hash where each key is one of the checksums that you are willing to upload",
            "patternProperties": {
                "[0-9a-f]{32}": {
                    "type": "null"
                }
            }
        }
    }
}