This is the mesh-blob subset of a DisplayBatch minus the compressedData field (the blob is
opaque to its own metadata header). Kept separate from the public DisplayBatch type because the
blob's metadata never carries compressedData itself — it would be circular.
Metadata JSON embedded inside the binary blob.
This is the mesh-blob subset of a
DisplayBatchminus thecompressedDatafield (the blob is opaque to its own metadata header). Kept separate from the publicDisplayBatchtype because the blob's metadata never carriescompressedDataitself — it would be circular.