{
  "manageEntity": {
    "action": "Update",
    "entityId": "999492801",
    "entityType": "Playlist",
    "metadata": "{\"cid\":\"\",\"data\":{\"playlist_contents\":[{\"timestamp\":1792824330,\"track_id\":42116}]}}",
    "nonce": "1792824330240571879",
    "signature": "0x7dc8b076048fd70a2af963618634ed37af3dae88311debe466a7b1017facc5b665bcd470a93a4cecbfcff455d24c3936fa8b16d354f10d4ef3314667c896e1c11b",
    "signer": "0x922cb2AE695da9f7Dd0e556954c23eeeb8bfFe0E",
    "userId": "758830720"
  }
}