{
  "manageEntity": {
    "action": "Update",
    "entityId": "853983614",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xa9ecb0d96a96008e1c147ee455c3d5949aa7090208b1ab7276b120c01e3a69e5",
    "signature": "0xfcb9c4a2b3f078e511cc3c75e2b7175730469c35adf06c79476bd7abe60041cc390272dff83e553b86faba88cf08054b4c49d2b694481e91bc58743e5cd1fc611c",
    "signer": "0xC4f9728E11607F95d004ba9a5425762d5558Db66",
    "userId": "853983614"
  }
}