pzadexcntrct

{
  "name": "clearblack",
  "base": "",
  "fields": [
    {
      "name": "user",
      "type": "string"
    },
    {
      "name": "is_buy",
      "type": "uint8"
    },
    {
      "name": "pair",
      "type": "name"
    }
  ]
}