challengeyou

{
  "name": "updateclg",
  "base": "",
  "fields": [
    {
      "name": "challenge_id",
      "type": "uint64"
    },
    {
      "name": "description",
      "type": "string"
    },
    {
      "name": "receivers",
      "type": "name[]"
    }
  ]
}