curl --location --request POST 'http://https://gateway.<baseUrl>/ingestion/v1/folder/<scopeId>/properties' \
--header 'Authorization: Bearer <yourToken>' \
--header 'Content-Type: application/json' \
--data-raw '{
    "properties": {
        "ingestionConfig": {
            "pdfReadMode": "CUSTOM_SINGLE_PAGE_API",
            "customApiOptions": [{
                "customsationType": "CUSTOM_SINGLE_PAGE_API",
                "customApiIdentifierapiIdentifier": "Unique Text Extraction API"
            }]
        }
    },
    "applyToSubScopes": true
}'

{
  ...
  "ingestionConfig": {
      "pdfReadMode": "CUSTOM_SINGLE_PAGE_API",
      "customApiOptions": [{
          "customsationType": "CUSTOM_SINGLE_PAGE_API",
          "customApiIdentifierapiIdentifier": "Unique Text Extraction API"
      }]
  },
  ...
}