curl --request GET \
  --url https://api.syntage.com/entities/{entityId}/identifiers \
  --header 'X-API-Key: <api-key>'

{
  "@context": "/contexts/EntityIdentifier",
  "@id": "/entities/91106968-1abd-4d64-85c1-4e73d96fb997/identifiers",
  "@type": "hydra:Collection",
  "hydra:member": [
    {
      "@id": "/.well-known/genid/78c595ac88fa9659fa80",
      "@type": "EntityIdentifier",
      "id": "e0a24894-7fbf-48ae-bfb0-efaae30a6319",
      "link": "/entities/91106968-1abd-4d64-85c1-4e73d96fb997",
      "country": "mx",
      "identifier": "rfc",
      "value": "XAXX010101000",
      "createdAt": "2020-01-01T12:15:00.000Z",
      "updatedAt": "2020-01-01T12:15:00.000Z"
    }
  ],
  "hydra:totalItems": 1,
  "hydra:view": {
    "@id": "<string>",
    "@type": "hydra:PartialCollectionView",
    "hydra:first": "<string>",
    "hydra:next": "<string>",
    "hydra:last": "<string>"
  },
  "hydra:search": {
    "@type": "<string>",
    "hydra:template": "<string>",
    "hydra:variableRepresentation": "<string>",
    "hydra:mapping": [
      {
        "@type": "<string>",
        "variable": "<string>",
        "property": "<string>",
        "required": true
      }
    ]
  }
}