Exporting coordinates of polygons made by autosegment

i have used autosegment to perform image segmentation and now i want to export annotations and polygon coordinates. When i am exporting my annotations in ndjson format i am not able to get coordinates of the polygon segment instead i am able to get composite mask can someone help me with this?

you can retrieve the coordinate shapely.bounds via the image.

Hey i am getting ndjson file in this form

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