pdns-slave/conf/hosts.json.default

{
  "defaults": {
    "action": "add_host",
    "domain": "example.com",
    "reverse_domain": "1.168.192",
    "reverse_enabled": true,
    "record_type": "A",
    "dhcp_mac": ""
  },
  "actions":[
  {
    "action": "add_domain",
    "domain": "1.168.192.in-addr.arpa"
  },
  {
    "action": "del_domain",
    "domain": "2.168.192.in-addr.arpa"
  },
  {
    "host": "test",
    "record_value": "192.168.1.2",
    "dhcp_mac": "aa:bb:cc:dd:ee:42"
  },
  {
    "host": "test2",
    "record_value": "192.168.1.3",
    "dhcp_mac": "de:ad:de:ad:de:ad"
  },
  {
    "action": "del_host",
    "host": "badhost"
  }
  ]
}