{
  "manageEntity": {
    "action": "Update",
    "entityId": "1852977293",
    "entityType": "Playlist",
    "metadata": "{\"cid\":\"\",\"data\":{\"description\":\"\",\"playlist_name\":\"New playlist\",\"is_private\":true,\"playlist_image_sizes_multihash\":\"baeaaaiqsedw2qiupcurm3p5nrihotgxixucibqyubmvjm2ck2uuw5zqzjybyg\",\"ddex_release_ids\":null,\"ddex_app\":\"\",\"upc\":\"\",\"artists\":null,\"copyright_line\":null,\"producer_copyright_line\":null,\"is_image_autogenerated\":true,\"playlist_contents\":[{\"timestamp\":0,\"metadata_timestamp\":1777541934,\"track_id\":438895}]}}",
    "nonce": "0x962fda47fdcaa3d96a07165c99221d219d55e0fd5217fd7182a109ad6e047a02",
    "signature": "0x03f8a6cd366cbba5acd992809c0ba89aea4d4fb4d444f26033392a2c53ddf45b5cdcc161f0cfecef20414a94601e4bbcd1e2b58d693795962640e73204eb4bc41c",
    "signer": "0xff56e94800bDdD3478A34765243D06F0240D7BEf",
    "userId": "128375910"
  }
}