{
  "manageEntity": {
    "action": "Update",
    "entityId": "321575597",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xeef67e8144a10305d88468fe25016f7fe008fa07484ca931cd597b3fdf2a8932",
    "signature": "0xd2cf5a1830b4d135955f656da59cd0a2cc7fa2a186d1d592a9d8bcf70a7a28514678d178b59b34c8c9a339f3f51d6162e27ea4c85d33846ba8902904272d7e801c",
    "signer": "0x5C40b7A4d7eFF7C2F861E6357FD69f07a7b59f7d",
    "userId": "321575597"
  }
}