This models a etcd2 compliant access point for setting a property value:
{
"action": "set",
"node": {
"createdIndex": 3,
"key": "/message",
"modifiedIndex": 3,
"value": "Hello etcd"
},
"prevNode": {
"createdIndex": 2,
"key": "/message",
"value": "Hello world",
"modifiedIndex": 2
}
}