Validate a query and return pipeline graph

{
  "errors": [
    "<string>"
  ],
  "graph": {
    "edges": [
      {
        "destId": 1,
        "edgeType": "<string>",
        "keyType": "<string>",
        "srcId": 1,
        "valueType": "<string>"
      }
    ],
    "nodes": [
      {
        "description": "<string>",
        "nodeId": 1,
        "operator": "<string>",
        "parallelism": 1
      }
    ]
  }
}