{
  "manageEntity": {
    "action": "Update",
    "entityId": "5500",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xef9f71e87672a784c30db3f49b014859e30bc42c586056f6da61a488d49a9a1f",
    "signature": "0xc3ba6f89537c6bd372a3fdc762974b627bd9658d8f79ce344038fb079b3946611a4055a3977afbe80387049e94e116fa4414de1f9c2af3a5b8f140f20531b5381b",
    "signer": "0xDC9FB11483106d427BaC29ff4bf0E03f11b4e19E",
    "userId": "5500"
  }
}