{
  "$ref": "#/definitions/MessageSignRequest",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "definitions": {
    "MessageSignRequest": {
      "additionalProperties": false,
      "properties": {
        "callbackURL": {
          "type": "string"
        },
        "message": {
          "type": "string"
        },
        "publicKey": {
          "type": "string"
        }
      },
      "required": [
        "message",
        "publicKey"
      ],
      "type": "object"
    }
  }
}