Can I use this to inject JSONLD into the header?

I'm looking for a way to inject something like the below into the header on a specific route. This addon seems like it might do the trick but I'm not sure how to make it work.

```

{
"@context": "http://schema.org",
"@type": "Dataset",
"name": {{name}},
"description": {{description}},
"url": {{url}},
"keyworlds": {{tags}},
"creator": {
"@type": "Person",
"name": {{owner}}
},
"spatialCoverage": {
"@type": "Place",
"geo": {
"@type": "GeoShape",
"box:": {{coordinates}}
}
},
"license": {
"url": {{structuredLicense.url}}
}
}

```