{
  "manageEntity": {
    "action": "Update",
    "entityId": "603916020",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x55e8579f2ec718f040052922d08a4798dd3566066c7334947eb63baf4de4b34b",
    "signature": "0xa6f03ff624539f4a3f576435c8cbaa043f59096a0a49c2de9a645972bd3157ca283b642fd3a400230c9d2034db7e978f8c0c4e80f823e8defbe710412f3b72db1b",
    "signer": "0xE35DcC5C816D790A9f730B4696F43Caf64d5d1e6",
    "userId": "603916020"
  }
}