{
  "manageEntity": {
    "action": "Update",
    "entityId": "62242219",
    "entityType": "Playlist",
    "metadata": "{\"cid\":\"\",\"data\":{\"playlist_contents\":[{\"timestamp\":1789817207,\"track_id\":1783782218},{\"timestamp\":1789817208,\"track_id\":2063388057},{\"timestamp\":1789817209,\"track_id\":1056378557},{\"timestamp\":1789817210,\"track_id\":1739871344}]}}",
    "nonce": "1789817207705076076",
    "signature": "0xc66b910390853a33ccaada1baadd0b60763104c504198be7f20fc900cdfa3a0e6e23ca16fe2ab5bd67b2739ad55fa65c2c65d43751cfb7199773595b93c3d3101b",
    "signer": "0xeaB6b479B33FEc6303065aeab4C0b6D344f091C6",
    "userId": "1421026"
  }
}