Create a new pipeline

{
  "action": "none",
  "actionInProgress": true,
  "actionText": "<string>",
  "checkpointIntervalMicros": 1,
  "createdAt": 1,
  "graph": {
    "edges": [
      {
        "destId": 1,
        "edgeType": "<string>",
        "keyType": "<string>",
        "srcId": 1,
        "valueType": "<string>"
      }
    ],
    "nodes": [
      {
        "description": "<string>",
        "nodeId": 1,
        "operator": "<string>",
        "parallelism": 1
      }
    ]
  },
  "id": "<string>",
  "name": "<string>",
  "preview": true,
  "query": "<string>",
  "stop": "none",
  "udfs": [
    {
      "definition": "<string>",
      "language": "python"
    }
  ]
}