{
  "serviceName": "catalog",
  "version": "v1",
  "url": "/api/catalog/v1",
  "protocol": "REST",
  "visualRange": "1",
  "nodes": [
    {
      "ip": "10.74.55.66",
      "port": "6666",
      "ttl": 0
    },
    {
      "ip": "10.74.56.37",
      "port": "8989",
      "ttl": 0
    },
    {
      "ip": "10.74.56.36",
      "port": "8988",
      "ttl": 0
    }
  ]
}

serviceName: service name
version: version
url: url of the created service instance
protocol: supported protocols: 'REST', 'UI', 'HTTP','TCP'
nodes: the service instance nodes list to register
ip: the ip of the service instance node, it could also be a hostname like catalog.onap.org
port: the port of the service instance node
ttl: time to live, this parameter is reserved for later use