curl --request GET \
  --url https://{cluster}.voucherify.io/v1/loyalties/{campaignId}/tiers/{loyaltyTierId}/rewards \
  --header 'Authorization: Bearer <token>' \
  --header 'X-App-Id: <api-key>' \
  --header 'X-App-Token: <api-key>'

{
  "object": "list",
  "data_ref": "data",
  "data": [
    {
      "reward": {
        "id": "rew_QuWYsBNB2G3fikffjnl0G3gH",
        "name": "API - Testing",
        "type": "CAMPAIGN",
        "parameters": {
          "campaign": {
            "id": "camp_jcErmtGAOmHUAy0oUgkwKnPZ",
            "balance": 500,
            "type": "LOYALTY_PROGRAM"
          }
        },
        "stock": null,
        "redeemed": null,
        "created_at": "2022-08-25T09:32:04.579424+00:00",
        "updated_at": "2022-08-25T09:33:46.680639+00:00",
        "metadata": {
          "Type": "Second campaign"
        },
        "object": "reward"
      },
      "assignment": {
        "id": "rewa_3Z2sP0bmqcL0ggU28GvFeHU3",
        "reward_id": "rew_QuWYsBNB2G3fikffjnl0G3gH",
        "related_object_id": "camp_fkZ28pe7DUAEmmabofkxHI8N",
        "related_object_type": "campaign",
        "parameters": {
          "loyalty": {
            "points": 40
          }
        },
        "created_at": "2022-11-23T22:11:58.759092+00:00",
        "updated_at": null,
        "object": "reward_assignment"
      },
      "object": "loyalty_tier_reward"
    },
    {
      "reward": {
        "id": "rew_XoDgmQ2HZX7qPM6aIEuslObo",
        "name": "Material",
        "type": "MATERIAL",
        "parameters": {
          "product": {
            "id": "prod_0b15f6b9f650c16990",
            "sku_id": "sku_0b1621b319d248b79f"
          }
        },
        "stock": 2,
        "redeemed": 1,
        "attributes": {
          "image_url": "{{internalVoucherifyURL}}",
          "description": "Archie's Series"
        },
        "created_at": "2022-08-29T06:02:36.753873+00:00",
        "updated_at": "2022-11-08T08:01:26.883166+00:00",
        "metadata": {
          "Type": "Material"
        },
        "object": "reward"
      },
      "assignment": {
        "id": "rewa_Or6gWZ5ASuGkBLjOf0IyiD4k",
        "reward_id": "rew_XoDgmQ2HZX7qPM6aIEuslObo",
        "related_object_id": "camp_fkZ28pe7DUAEmmabofkxHI8N",
        "related_object_type": "campaign",
        "parameters": {
          "loyalty": {
            "points": 30
          }
        },
        "created_at": "2022-11-23T22:11:58.759092+00:00",
        "updated_at": null,
        "object": "reward_assignment"
      },
      "object": "loyalty_tier_reward"
    },
    {
      "reward": {
        "id": "rew_MVXA2kV7lZ1zC057WUaTrvNz",
        "name": "100 Points = $20",
        "type": "COIN",
        "parameters": {
          "coin": {
            "exchange_ratio": 20,
            "points_ratio": 100
          }
        },
        "stock": null,
        "redeemed": null,
        "attributes": {},
        "created_at": "2022-09-09T06:41:54.496035+00:00",
        "updated_at": null,
        "metadata": {},
        "object": "reward"
      },
      "assignment": {
        "id": "rewa_nMXB59qGTNYawMT8eP8M4oUp",
        "reward_id": "rew_MVXA2kV7lZ1zC057WUaTrvNz",
        "related_object_id": "camp_fkZ28pe7DUAEmmabofkxHI8N",
        "related_object_type": "campaign",
        "created_at": "2022-11-09T11:01:21.065681+00:00",
        "updated_at": null,
        "object": "reward_assignment"
      },
      "object": "loyalty_tier_reward"
    }
  ],
  "total": 3
}