json_schema: {
      "$schema": "http://json-schema.org/draft-04/schema#",
      "type": "array",
      "items": {
          "type": "object",
          "properties": {
              "id": {
                  "type": "number"
              },
              "buys": {
                  "type": "array",
                  "items": {
                      "type": "object",
                      "properties": {
                          "listings": {
                              "type": "number"
                          },
                          "unit_price": {
                              "type": "number"
                          },
                          "quantity": {
                              "type": "number"
                          }
                      },
                      "required": [
                          "listings",
                          "unit_price",
                          "quantity"
                      ]
                  }
              },
              "sells": {
                  "type": "array",
                  "items": {
                      "type": "object",
                      "properties": {
                          "listings": {
                              "type": "number"
                          },
                          "unit_price": {
                              "type": "number"
                          },
                          "quantity": {
                              "type": "number"
                          }
                      },
                      "required": [
                          "listings",
                          "unit_price",
                          "quantity"
                      ]
                  }
              }
          },
          "required": [
              "id",
              "buys",
              "sells"
          ]
      },
      "properties": {},
      "additionalProperties": false
  }