{
  "manageEntity": {
    "action": "Update",
    "entityId": "1422350417",
    "entityType": "Playlist",
    "metadata": "{\"cid\":\"\",\"data\":{\"playlist_contents\":[{\"timestamp\":1778506241,\"track_id\":632652},{\"timestamp\":1778506241,\"track_id\":810977}]}}",
    "nonce": "1778506241375006498",
    "signature": "0x2983cef1c81c932aa7bbc6b6fc51864911ad0189eccdd7cfd2140be5aaedf148336887826391c24c34d6798caae485d8c1e986e866704a2dc37e37bd87014a4e1c",
    "signer": "0xecaC916FafF0E75Df08fc73D2252307ae8DF8981",
    "userId": "477662771"
  }
}