{
  "manageEntity": {
    "action": "Update",
    "entityId": "255565896",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x57fb1248692aa084e79af52ba13944cf2300097469d67226eee2f62557f36747",
    "signature": "0x31187238a6412655d56e22724eee0cc7786082c49f8363a627a375410f2bf1367c234629399adec7bc77c2b660fc0e9b9fe02ec6047c0542561a8df5c3c244091c",
    "signer": "0x155d63D8364e0ce505378329e1d95d15A5B09f72",
    "userId": "255565896"
  }
}