{
  "$schema": "http://json-schema.org/draft-07/schema",
  "$id": "BalanceUpdate.json",
  "title": "BalanceUpdate",
  "description": "POST /balance body",
  "type": "object",
  "properties": {
    "accountId": {
      "description": "account id of the balance to modify",
      "type": "string"
    },
    "amountDiff": {
      "description": "The amount to modify the balance by (positive or negative)",
      "type": "string",
      "pattern": "^(0|-?[1-9][0-9]*)$"
    }
  },
  "required": ["accountId", "amountDiff"],
  "additionalProperties": false
}