{
  "manageEntity": {
    "action": "Update",
    "entityId": "958334581",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xe9a4b275d5574b2468671f2f32a9e56c490f1bd57e515b3ce94443d0e52ccaf3",
    "signature": "0xb83a7e5aafc02f6691727ee20f69737b2dc879d6ec99485c8507c3ece8e68be6331131f84f13a909f6dcd5b90988afbe7dcfb3c2f03aec61d8a55d38fc4d6e451b",
    "signer": "0x99E5e91bd122b44C2999e59d7bDbD2A1353872d8",
    "userId": "958334581"
  }
}