setcontracts

{
  "name": "ad_subject",
  "base": "",
  "fields": [
    {
      "name": "subject_id",
      "type": "uint64"
    },
    {
      "name": "answer_id",
      "type": "uint64"
    },
    {
      "name": "ad_id",
      "type": "uint64"
    }
  ]
}