defindbigger

{
  "name": "changerate",
  "base": "",
  "fields": [
    {
      "name": "user",
      "type": "name"
    },
    {
      "name": "currenttime",
      "type": "uint64"
    },
    {
      "name": "rationum",
      "type": "uint64"
    },
    {
      "name": "disposetotal",
      "type": "asset"
    },
    {
      "name": "disposereturn",
      "type": "asset"
    },
    {
      "name": "prereturn",
      "type": "asset"
    },
    {
      "name": "preprice",
      "type": "string"
    },
    {
      "name": "afterprice",
      "type": "string"
    },
    {
      "name": "luckytime",
      "type": "uint64"
    }
  ]
}