Get an upload URL for a field reference file

curl -X POST 'https://api.expiryedge.com/v1/getCollectionTemplateReferenceUploadUrl' \
  -H "Authorization: Bearer $EXPIRYEDGE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "templateId": "tpl_W9onboard",
  "fieldId": "fld_insurance",
  "filename": "sample-certificate.pdf",
  "contentType": "application/pdf",
  "sizeBytes": 120331
}'

{
  "uploadUrl": "https://storage.googleapis.com/stylingsphere.appspot.com/organizations/org_northwind/collection-templates/tpl_W9onboard/fields/fld_insurance/reference-1b2c-sample-certificate.pdf?X-Goog-Algorithm=GOOG4-RSA-SHA256&X-Goog-Expires=900&X-Goog-Signature=...",
  "storagePath": "organizations/org_northwind/collection-templates/tpl_W9onboard/fields/fld_insurance/reference-1b2c-sample-certificate.pdf",
  "uploadHeaders": {
    "Content-Type": "application/pdf"
  }
}