webapp/.dart_tool/chrome-device/Default/BrowsingTopicsState

{
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      "config_version": 0,
      "model_version": "0",
      "padded_top_topics_start_index": 0,
      "taxonomy_version": 0,
      "top_topics_and_observing_domains": [  ]
   } ],
   "hex_encoded_hmac_key": "C3CC511CB3EBFBBED1024FB468CB5DD24640AE34E0232CE92B945F8568E4DBCA",
   "next_scheduled_calculation_time": "13371618025606087"
}