json_schema: {
      "$schema": "http://json-schema.org/draft-04/schema#",
      "title": "Crystallisation",
      "type": "object",
      "properties": {
          "calculationId": {
              "title": "Calculation ID",
              "description": "The calculation ID that was returned by intent to crystallise endpoint.",
              "type": "string",
              "example": "041f7e4d-87d9-4d4a-a296-3cfbdf92f7e2"
          }
      },
      "required": [
          "calculationId"
      ],
      "additionalProperties": false
  }