{
  "manageEntity": {
    "action": "Update",
    "entityId": "199516921",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaieraoxle5mrbaqbbiqnmxu4trlozbp7u72hotcrtcsf5atmy757y4wyq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":631542371},{\"type\":\"playlist\",\"playlist_id\":1638193401},{\"type\":\"playlist\",\"playlist_id\":366181211}]}}}",
    "nonce": "0x72911a26a0278ae9c33b43c3ea1e2a79717ad618c1e2461f54d82adf0e0b42ad",
    "signature": "0x3d51c615cac9ba6a9ca726a9a4f0aeea5d4a5aade507e62731787fd1e2544d2b7ca95ec0c5da0adb0f61079d83b902b5cf6a3f20745f5caa676e0c24269985561c",
    "signer": "0x49A438454131D4e8F2A2547287Fc46167b168F47",
    "userId": "199516921"
  }
}