@type being deleted on update after text edit

I am trying to add this piece of LD+JSON in the wordpress text editor:

\ <script type=”application/ld+json”>
{ “@context”: “https://schema.org&#8221;,
“@type”: “Article”,
“headline”: “[article title]”,
“alternativeHeadline”: “[article sub heading]”,
“image”: “[main article image url]”,
“author”: “[author name]”,
“datePublished”: “[date in ISO format e.g. 2014-03-16]”,
“description”: “[article summary]”
}
</script>
\

It pastes in OK but when I hit update and then look at the text editor it has done this:
\
<script type=”application/ld+json”>
{ “: “https://schema.org&#8221;,
“: “Article”,
“headline”: “[article title]”,
“alternativeHeadline”: “[article sub heading]”,
“image”: “[main article image url]”,
“author”: “[author name]”,
“datePublished”: “[date in ISO format e.g. 2014-03-16]”,
“description”: “[article summary]”
}
</script>

\

I thought that the text editor would allow you to enter code without interfering with it?

I have tried disabling all plugins to no avail.

Driving me nuts!!!

Mike