How to parse json nested attributes using Jinja

Question

I am relatively new to using Jinja and have questions. I was wondering if there is a different solution to parsing nested JSON attributes using Jinja? The below solution seems fine for a small payload. But, I am wondering if there is a better way? This solution doesn't seem like it would be effective if I was using a larger payload.

Sample Payload:

  {
"campaign_id":"123456789",
  "email":"[email protected]",
  "template_attributes":{
    "notificationDate" : "January 01, 2022",
    "orderNumber" : "1234567",
    "orderDateTime" : "01/01/2022 11:11 PM",
    "orderDate" : "January 01, 2022",
    "billingInfo" : {
      "firstName" : "Tester",
      "lastName" : "Mctesterson",
      "addressLine1" : "1234 TEST ST",
      "city" : "TESTVILLE",
      "state" : "TN",
      "postalCode" : "12345",
      "phoneNumber" : "1234567890",
      "country" : "US",
      "customerEmailAddress" : "[email protected]"
    }
  }
}

Jinja used:

 {%if billingInfo is defined%}
 <p style="font-family: Arial, sans-serif; font-size: 16px; color: #333333;">
    {{billingInfo.firstName}} {{billingInfo.lastName}}<br>
    {{billingInfo.addressLine1}}<br>
    {%if billingInfo.addressLine2 %} {{billingInfo.addressLine2}}<br> {%endif%}
    {{billingInfo.city}}, {{billingInfo.state}}  {{billingInfo.postalCode}}<br>
</p>
{%endif%}

Output:
Tester Mctesterson
1234 TEST ST
TESTVILLE, TN 12345

Proposed Larger Payload:

  {
"campaign_id":"123456789",
  "email":"[email protected]",
  "template_attributes":{
    "notificationDate" : "January 01, 2022",
    "orderNumber" : "1234567",
    "orderDateTime" : "01/01/2022 11:11 PM",
    "orderDate" : "January 01, 2022",
    "billingInfo" : {
      "firstName" : "Tester",
      "lastName" : "Mctesterson",
      "addressLine1" : "1234 TEST ST",
      "city" : "TESTVILLE",
      "state" : "TN",
      "postalCode" : "12345",
      "phoneNumber" : "1234567890",
      "country" : "US",
      "customerEmailAddress" : "[email protected]"
    },
      "PaymentInfoList" : {
        "PaymentInfo" : {
          "paymentMethod" : "Credit Card [Test]",
          "cardBrand" : "Test",
          "accountNumberLast4" : "1234",
          "paymentAmount" : "12.34"
        }
     }
  }
}