curl --request PATCH \
  --url https://vortexpdf.com/api/v1/templates/{id} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "template": {
    "content": "<h1>Invoice</h1><p>This is a sample invoice template</p>",
    "name": "Invoice Template",
    "preview_context": {
      "amount": 1000,
      "customer": "Acme Inc."
    }
  }
}'

{
  "data": {
    "content": "<h1>Invoice</h1><p>This is a sample invoice template</p>",
    "id": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
    "inserted_at": "2020-01-01T00:00:00Z",
    "name": "Invoice Template",
    "preview_context": {
      "amount": 1000,
      "customer": "Acme Inc."
    },
    "updated_at": "2020-01-01T00:00:00Z"
  }
}