{
  "manageEntity": {
    "action": "Update",
    "entityId": "1294304615",
    "entityType": "Playlist",
    "metadata": "{\"cid\":\"\",\"data\":{\"description\":\"\",\"playlist_name\":\"Playlist\",\"is_private\":false,\"playlist_image_sizes_multihash\":\"baeaaaiqseagwazzb2pjij6nextpng3eclo2qryrvxrmfpqbzxygjvqayegmhs\",\"ddex_release_ids\":null,\"ddex_app\":\"\",\"upc\":\"\",\"artists\":null,\"copyright_line\":null,\"producer_copyright_line\":null,\"is_image_autogenerated\":false,\"playlist_contents\":[{\"timestamp\":1777541525,\"metadata_timestamp\":1777541525,\"track_id\":438895}]}}",
    "nonce": "0xb689eb87ba9c3c92fa88d1c1b299a60c5aa145af819441eafe89b55ae98977ee",
    "signature": "0x29bb6a1c14b417064279e1155678245d5fbab07b8ab586eab504426ecf59457d56e8b6c444ef7b5fa958498f5fa8fcb2c902bc5a357160f9648349d2917b7a291c",
    "signer": "0xff56e94800bDdD3478A34765243D06F0240D7BEf",
    "userId": "128375910"
  }
}