{
  "manageEntity": {
    "action": "Update",
    "entityId": "338144844",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x8402c4d3da302d19a6485a37f5edeb6102198e2696e029bd7711448e6b4ff198",
    "signature": "0xe067deea4776f85139606f1fdfc9c3c6e731d34db7c23a1f069649da7bd87c605065e57abd4fd01bcc767f55e7b060af2320ed6c4918a4fc74fd06c1e7dc225c1c",
    "signer": "0x88Ca08fae3cda57D2c3386c1066E7c64586c8c20",
    "userId": "338144844"
  }
}