{
  "manageEntity": {
    "action": "Update",
    "entityId": "138655938",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x1ad9d8299a1bc373cc34f031dac06caff0ba14163d22e0e07ec297e363c7d344",
    "signature": "0x127772b7e56e7eaad695e718fea0e27dd164aed0240dd114d8c479763190df0b3073d47d1fb23daab8c826bc055c8479008c1f217921956f02e11147bbf3bf9f1b",
    "signer": "0x87f8538D39d3B2C6ce4d4343De4b6Aa2d5e75676",
    "userId": "138655938"
  }
}