{"NetworkInterfaces": [{"Attachment": {"AttachTime": "2012-07-01T21:45:27.000Z",
                                         "AttachmentId": "eni-attach-6537fc0c",
                                         "DeleteOnTermination": true,
                                         "DeviceIndex": 0,
                                         "InstanceId": "i-22197876",
                                         "InstanceOwnerId": "123456789012",
                                         "Status": "attached"},
                         "AvailabilityZone": "ap-southeast-1b",
                         "Description": "",
                         "Groups": [{"GroupId": "sg-3f4b5653",
                                      "GroupName": "default"}],
                         "MacAddress": "02:81:60:cb:27:37",
                         "NetworkInterfaceId": "eni-0f62d866",
                         "OwnerId": "123456789012",
                         "PrivateIpAddress": "10.0.0.146",
                         "PrivateIpAddresses": [{"Primary": true,
                                                  "PrivateIpAddress": "10.0.0.146"},
                                                 {"Primary": false,
                                                  "PrivateIpAddress": "10.0.0.148"},
                                                 {"Primary": false,
                                                  "PrivateIpAddress": "10.0.0.150"}],
                         "RequesterManaged": false,
                         "SourceDestCheck": true,
                         "Status": "in-use",
                         "SubnetId": "subnet-c53c87ac",
                         "TagSet": [],
                         "VpcId": "vpc-cc3c87a5"},
                        {"Attachment": {"AttachTime": "2012-06-27T20:08:44.000Z",
                                         "AttachmentId": "eni-attach-a99c57c0",
                                         "DeleteOnTermination": true,
                                         "DeviceIndex": 0,
                                         "InstanceId": "i-886401dc",
                                         "InstanceOwnerId": "123456789012",
                                         "Status": "attached"},
                         "AvailabilityZone": "ap-southeast-1b",
                         "Description": "Primary network interface",
                         "Groups": [{"GroupId": "sg-a2a0b2ce",
                                      "GroupName": "quick-start-1"}],
                         "MacAddress": "02:78:d7:00:8a:1e",
                         "NetworkInterfaceId": "eni-a66ed5cf",
                         "OwnerId": "123456789012",
                         "PrivateIpAddress": "10.0.1.233",
                         "PrivateIpAddresses": [{"Primary": true,
                                                  "PrivateIpAddress": "10.0.1.233"},
                                                 {"Primary": false,
                                                  "PrivateIpAddress": "10.0.1.20"}],
                         "RequesterManaged": false,
                         "SourceDestCheck": true,
                         "Status": "in-use",
                         "SubnetId": "subnet-cd8a35a4",
                         "TagSet": [],
                         "VpcId": "vpc-f28a359b"}],
 "ResponseMetadata": {"RequestId": "fc45294c-006b-457b-bab9-012f5b3b0e40"}}