curl --request POST \
  --url https://api.wizcommerce.com/v1/customers/{customer_id}/contacts \
  --header 'Content-Type: application/json' \
  --header 'X-API-Key: <api-key>' \
  --data '{
  "reference_id": "CUS123",
  "first_name": "John",
  "last_name": "Doe",
  "email": "john.doe@example.com",
  "phone": "+14155552671",
  "designation": "Sales Manager",
  "is_default": true,
  "attributes": [
    {
      "name": "1234567890",
      "value": "red"
    }
  ]
}'

{
  "data": {
    "id": "0c05a9a7-84ed-46f0-819b-653545730920",
    "reference_id": "CUS123",
    "first_name": "John",
    "last_name": "Doe",
    "email": "john.doe@example.com",
    "phone": "+14155552671",
    "designation": "Sales Manager",
    "status": "active",
    "is_default": false,
    "attributes": [
      {
        "id": "01f5d171-d3e3-4b2b-bd57-0727194b5bed",
        "name": "Color",
        "value": "Red",
        "created_by": "01f5d171-d3e3-4b2b-bd57-0727194b5bed",
        "updated_by": "01f5d171-d3e3-4b2b-bd57-0727194b5bed",
        "created_at": "2021-01-01T00:00:00Z",
        "updated_at": "2021-01-01T00:00:00Z"
      }
    ],
    "created_at": "2025-01-01T15:04:05Z",
    "updated_at": "2025-01-01T15:04:05Z"
  }
}