{
  "manageEntity": {
    "action": "Update",
    "entityId": "505182311",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xfc19611b106fa578224680c5ad5526a52206546d68777489194e93cd2af8d978",
    "signature": "0xc6a1531aab7174201ed3dbae43c633660064ccea1b71c6c23d9182683e44c18d5ac713538cdaa0501bf7619357ec0914f3d48caf1fbc305d7a273a928226815e1b",
    "signer": "0xA819E5C5714510Db532e726DB8526f18026feA20",
    "userId": "505182311"
  }
}