{
  "manageEntity": {
    "action": "Update",
    "entityId": "253974099",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x43b5113ec0fe96458e170cdd336c5ba2187366309a56532757bc5073b73b3f6e",
    "signature": "0x17f456350f55496fbe756b47c443fb9d5499a9579762968714d8afe5916f109f3e76c24554a0287b43f262b11a04e59450fe715a08939670d35991b3dfae91401b",
    "signer": "0x1904a0f8fd3A6a7aaEBb8c7BF116CF78D197362C",
    "userId": "253974099"
  }
}