{
  "manageEntity": {
    "action": "Update",
    "entityId": "1146585034",
    "entityType": "Playlist",
    "metadata": "{\"cid\":\"\",\"data\":{\"description\":\"\",\"playlist_name\":\"헬스\",\"is_private\":true,\"playlist_image_sizes_multihash\":\"\",\"ddex_release_ids\":null,\"ddex_app\":\"\",\"upc\":\"\",\"artists\":null,\"copyright_line\":null,\"producer_copyright_line\":null,\"is_image_autogenerated\":false,\"playlist_contents\":[]}}",
    "nonce": "0xa2cec1aef9640bb77f2223852badd8cfb293f4af20da18dd96a24d319c84c04d",
    "signature": "0xe3c98699f1d976cf20f1b08878f7ebd60142bddafc2c97dffc625a66525037e727b9d9eac958d0ae157b51b25d117a85997a22a5adbf683d57eeb4b1f397bc861b",
    "signer": "0x9D8826fD99d7F16F2FE1cbE76Dd7890750ec730A",
    "userId": "151555504"
  }
}