To create/update an A record
curl -H 'Content-Type: application/json' -X PATCH --data '{"rrsets": [ {"name": "test.yourdomain.com.", "type": "A", "ttl": 86400, "changetype": "REPLACE", "records": [ {"content": "192.0.5.4", "disabled": false } ] } ] }' -H 'X-API-Key: YUdDdGhQM0tMQWV5alpJ' http://localhost:8081/api/v1/servers/localhost/zones/yourdomain.com | jq .