Example response

{
  "customer": {
    "tier_eligibility": {
      "tier_spend": {
        "now": {
          "amount": 9.9,
          "formatted": "$9.90"
        },
        "at_expiration": {
          "amount": 9.9,
          "formatted": "$9.90"
        }
      },
      "spend_needed_for_renewal": {
        "amount": 9.9,
        "formatted": "$9.90"
      },
      "spend_needed_for_upgrade": {
        "amount": 9.9,
        "formatted": "$9.90"
      }
    }
  }
}