{
  "manageEntity": {
    "action": "Update",
    "entityId": "520478850",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xa8e36dbb94fb58bb61bde90f0e825e1fa9241ea7ee35185b9cc69ee692969f11",
    "signature": "0x775cfe963be8126df45fa6c1f9c637a20d6710a05e42c009e3ba950e8164841917c66a085580a2fde665b42e1ef85dd02ec1d40c5ed1e0095f50306805f8a8231b",
    "signer": "0xFBEa52d3E4eDDB828C76B6a06eF443674bB301f4",
    "userId": "520478850"
  }
}