ExifTool truncates ASCII MakerNote data
ExifTool can be used to output a specific Exif MakerNote from your images’ metadata by using the following command:
exiftool -u -Unknown_0x0013 image.jpg
This will output makernote Id 0x13, however if the makernote that you are interested is long, then ExifTool may truncate it and output only the start with […] at the end!
Unknown 0x0013 : {"distortion":{"factory":{"version":"1.0","medium":"air[...]
To have ExifTool output the full makernote, use the -b (binary) option like this:
exiftool -u -b -Unknown_0x0013 image.jpg