{
  "manageEntity": {
    "action": "Update",
    "entityId": "664991753",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaieraixwa7xh4wlejqkks6bij2k776knsvkgbdzudgtclqsasocg2sxpa\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":460059292}]}}}",
    "nonce": "0xd7de1b0a9e13ab505ca92850d860b9c68ca6362adb11cebbc8a02f52de06f8b1",
    "signature": "0x2e9b71d36224a87c91446036ebfdf580a8f4bebb794bb9b5d2fe3a0db32067466dd6c989d13a1f464fd0eaf4fb15fcdad6441e68e1c6c105f7fa77b644a0e33a1c",
    "signer": "0xf034511ba85caD07c6D9c627B2E63af3306524AF",
    "userId": "664991753"
  }
}