{
  "manageEntity": {
    "action": "Update",
    "entityId": "1255197945",
    "entityType": "Playlist",
    "metadata": "{\"cid\":\"\",\"data\":{\"description\":\"\",\"playlist_name\":\"New playlist\",\"is_private\":true,\"playlist_image_sizes_multihash\":\"baeaaaiqsebttr5kyc3hksuezkl4vin6p2dhehe7wzomiapehdwijyql7xf2wk\",\"ddex_release_ids\":null,\"ddex_app\":\"\",\"upc\":\"\",\"artists\":null,\"copyright_line\":null,\"producer_copyright_line\":null,\"is_image_autogenerated\":false,\"playlist_contents\":[{\"timestamp\":0,\"metadata_timestamp\":1776706772,\"track_id\":162823896}]}}",
    "nonce": "0x46355a4bb1de1a003214d563cad32651ad850ca1f2e5432538eb76027cef5a9f",
    "signature": "0x9b7f83a90396681e90da0fa8e3ae30cbb7ebe787393322c8f24b5537d4d66a2c2dd1ee32cd206b44646c8a61efbfd24d8a8f476f7d1a9c4b489e3e28f9b5d1a11b",
    "signer": "0x775bA7FB8a4FF9354c099465ca493BA949FdAca6",
    "userId": "597677270"
  }
}