public String addVertex(String version, String type, VertexPayload payload) throws CrudException {
// Validate the incoming payload
Vertex vertex = OxmModelValidator.validateIncomingUpsertPayload(null, version, type, payload.getProperties());
+ vertex.getProperties().put(org.onap.schema.OxmModelValidator.Metadata.NODE_TYPE.propertyName(), type);
// Create graph request event
GraphEvent event = GraphEvent.builder(GraphEventOperation.CREATE)
.vertex(GraphEventVertex.fromVertex(vertex, version)).build();