Create a new family variant

Example request

{
  "code": "shoesVariant",
  "labels": {
    "en_US": "Shoes variant",
    "fr_FR": "Variante de chaussures"
  },
  "variant_attribute_sets": [
    {
      "level": 1,
      "attributes": [
        "color",
        "material"
      ],
      "axes": [
        "color"
      ]
    },
    {
      "level": 2,
      "attributes": [
        "sku",
        "size"
      ],
      "axes": [
        "size"
      ]
    }
  ]
}