Ask for a dataframe.
Get the grain you intended.

const response = await fetch(
  "https://higheredapi.com/api/v2/families/fall_enrollment_by_selected_major/query",
  {
    method: "POST",
    headers: {
      authorization: `Bearer ${process.env.HIGHER_ED_API_CLIENT_TOKEN}`,
      "content-type": "application/json"
    },
    body: JSON.stringify({
      institutions: ["hei_53dbb72e8fac1a81e058"],
      years: [2024],
      select: {
        dimensions: ["major_field", "student_level"],
        measures: ["measure.institutions.enrollment.headcount_us_nonresident_total"]
      },
      where: {
        attendance_status: ["all_students"],
        student_level: ["all_students_total", "all_students_first_professional"]
      },
      shape: "wide",
      aggregation: null,
      quality: "usable",
      limit: 250
    })
  }
);

const { data, meta } = await response.json();