{
  "manageEntity": {
    "action": "Create",
    "entityId": "1797343841",
    "entityType": "Playlist",
    "metadata": "{\"cid\":\"\",\"data\":{\"description\":\"\",\"playlist_name\":\"Welcome Sound@受付\",\"is_private\":true,\"playlist_image_sizes_multihash\":\"baeaaaiqsebze3th2pwzvukm32hq4isqjjus7xyzrl5kgcphnojncczmqlmgc2\",\"ddex_release_ids\":null,\"ddex_app\":\"\",\"upc\":\"\",\"artists\":null,\"copyright_line\":null,\"producer_copyright_line\":null,\"is_image_autogenerated\":false,\"playlist_contents\":[{\"timestamp\":1780465972,\"metadata_timestamp\":1780465972,\"track_id\":1658701208}]}}",
    "nonce": "0xeb0c09227568a987251a9983cf83969ec1fcadf53ceacbf80ac2be69e4e6932b",
    "signature": "0xb0c12f91e9b535ec9b90a16c8728253e0eabdde81a9db62ff42f9dfd9255291e59411b5c7134d19461d3a6c986d9c99fb787d4fbbf66c2970b49e39e329336a11c",
    "signer": "0x5877F7e1aB261CEa57f1734519117Ed49d50c8c3",
    "userId": "549983695"
  }
}