{
  "operation": "chunk",
  "chunk": {
    "protocol": "yachtmemory.signalk-catalog/2",
    "vessel_id": "e4b76f55-6bd9-4a2e-ab5a-8c538d9311fd",
    "snapshot_id": "d85d0cea-5775-4d7a-9afa-630f80ec49d3",
    "revision": 3,
    "chunk_index": 2,
    "records": [
      {
        "kind": "source",
        "source": "synthetic.source",
        "type": "TEST",
        "label": "Synthetic only"
      }
    ],
    "payload_sha256": "043323c4838c93efba40c34a7a8b7f4b1e3b46cf70bf70373b977e22711a3a1a"
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}