{
  "manageEntity": {
    "action": "Update",
    "entityId": "590830414",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xb14e33d04920165088cc68906ec6d7d6073ee6adb78efd03d66f77aee191afd4",
    "signature": "0xf46da511699adc33e6a60f2fff936e7d5c063ef411b1111dc6e2e99061c3b0275d0556c93e6961666b1018c1bd54490011c1813e0c014a6c9e674a620ec7ec901b",
    "signer": "0x99FC58b9AbbC0C373045aaAE3Ca68Ac6e5b586f8",
    "userId": "590830414"
  }
}