json_schema: {
      "$schema": "http://json-schema.org/draft-04/schema#",
      "title": "Ballot",
      "description": "ClearElection Ballot definition, v0.0",
      "type": "object",
      "properties": {
          "clearelection-ballot": {
              "enum": [
                  "v0.0"
              ]
          },
          "ballotId": {
              "type": "string"
          },
          "uniquifier": {
              "type": "string"
          },
          "contests": {
              "type": "array",
              "items": {
                  "type": "object",
                  "properties": {
                      "contestId": {
                          "type": "string"
                      },
                      "choices": {
                          "type": "array",
                          "items": {
                              "type": "object",
                              "properties": {
                                  "candidateId": {
                                      "type": "string"
                                  }
                              },
                              "required": [
                                  "candidateId"
                              ]
                          }
                      }
                  },
                  "required": [
                      "contestId",
                      "choices"
                  ]
              }
          },
          "demographic": {
              "type": "object"
          }
      },
      "required": [
          "clearelection-ballot",
          "ballotId",
          "uniquifier",
          "contests"
      ]
  }