final ObjectNode writeOp = mapper.createObjectNode();
writeOp.put("op", "store");
writeOp.put("input", inputId);
writeOp.put("storageengine", "queue");
writeOp.put("memo", "output sink");
QueueOutputInfo output = new QueueOutputInfo();
output.number = 0;
writeOp.put("target", mapper.convertValue(output, JsonNode.class));
return add(writeOp);
}