{
  "manageEntity": {
    "action": "Update",
    "entityId": "620178250",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x6c289c61adc0e201cf4eb628d258f3f6323d75f2862ad02134e915c612f195d1",
    "signature": "0xbea6a413772fe4b1062ab01f3ef744c42ce54442ecf7402066cafed999d715911d8ea474b51ee8eb33f32bcb09b986fedb935c475635b49c0f65ea33a81796401b",
    "signer": "0x77c7af1b3d2aC5c8D919AEC90f030b2770f9c7a6",
    "userId": "620178250"
  }
}