{
  "manageEntity": {
    "action": "Update",
    "entityId": "473219211",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x7373becc8478774171313322ba1667cd9e877c33f8ff4c0569ea8b092197dd30",
    "signature": "0xe5dfb6d316a72431d0f20f725b212eadf1c0f3ed46ea1ba951bdf90d3383ab4879c8a122326813841f9df428b1464e694d236efef0fbaf011178d2646a20e8821c",
    "signer": "0x8544F8deb69F40Bc253040E62b11728B8f765576",
    "userId": "473219211"
  }
}