json_schema: {
      "$schema": "http://json-schema.org/draft-04/schema#",
      "title": "Secret Santa Parameters",
      "description": "Contains information required to generate Secret Santa messages and emails",
      "type": "object",
      "properties": {
          "message": {
              "description": "Message to be sent in the email",
              "type": "string"
          },
          "subject": {
              "description": "Subject of the email",
              "type": "string"
          },
          "participants": {
              "description": "A participant of the Secret Santa",
              "type": "array",
              "items": {
                  "type": "object",
                  "properties": {
                      "name": {
                          "description": "Participants name",
                          "type": "string"
                      },
                      "email": {
                          "description": "Participants email",
                          "type": "string"
                      },
                      "exList": {
                          "description": "List of participant IDs who cannot this participant cannot buy for",
                          "type": "array",
                          "_uniqueItems": true,
                          "items": {}
                      },
                      "id": {
                          "description": "Unique identifier for participant",
                          "type": "integer"
                      }
                  },
                  "required": [
                      "name",
                      "email",
                      "exList",
                      "id"
                  ]
              }
          }
      },
      "required": [
          "message",
          "subject",
          "participants"
      ]
  }