defindbigger

{
  "name": "updatereturn",
  "base": "",
  "fields": [
    {
      "name": "updatetime",
      "type": "uint64"
    },
    {
      "name": "preprice",
      "type": "float64"
    },
    {
      "name": "afterprice",
      "type": "float64"
    }
  ]
}