{
  "manageEntity": {
    "action": "Update",
    "entityId": "621534741",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x5795eb0b1846ac793fde3e6cd994507f332f19c3123c29ac0cbbb0fbf21077f9",
    "signature": "0x5b591950df4b8ab2fbd0934cb4450adb0ca04bb154a539ac9212751c1f9acbe22e6f3f049b54918c15a4a5ca1cbdd23205e7465390616476aa560abd9083264a1c",
    "signer": "0x7c9023569D0688566422657303CC9788011C2a7d",
    "userId": "621534741"
  }
}