{
  "manageEntity": {
    "action": "Update",
    "entityId": "594647240",
    "entityType": "Playlist",
    "metadata": "{\"cid\":\"\",\"data\":{\"playlist_contents\":[{\"timestamp\":1788067744,\"track_id\":121304412},{\"timestamp\":1788067749,\"track_id\":315753242},{\"timestamp\":1788067749,\"track_id\":19873},{\"timestamp\":1788067749,\"track_id\":776751327},{\"timestamp\":1788067749,\"track_id\":572836},{\"timestamp\":1788067749,\"track_id\":367943},{\"timestamp\":1788067749,\"track_id\":1595000517},{\"timestamp\":1788067749,\"track_id\":317937}]}}",
    "nonce": "1788240395894809331",
    "signature": "0x056214bfa447e5bbe2a030de4c06d88c8a13b385398b26b84fc60eb64722cdab2893690a3fbf5dfb0f9384505c674269f27cdbeaaf8e1f7e7cc388bbd8229f611b",
    "signer": "0x922cb2AE695da9f7Dd0e556954c23eeeb8bfFe0E",
    "userId": "664531520"
  }
}