POST api/PostMail

[
  {
    "$id": "2",
    "idMail": "04f0ac94-04d8-4e7b-bc63-1b04c3b8a31b",
    "mail1": "sample string 2",
    "idTipoMail": "f939735a-ff97-40ef-bc2d-36c6a09e49fa",
    "Contacto": {
      "$id": "3",
      "$values": [
        {
          "$id": "4",
          "idContacto": "223acb19-ab8a-49be-89c0-abefc87d49fb",
          "Paterno": "sample string 2",
          "Materno": "sample string 3",
          "Nombre": "sample string 4",
          "Telefono": {
            "$id": "5",
            "$values": [
              {
                "$id": "6",
                "idTelefono": "dd6d6b9b-e3d0-4412-9458-b7eedeb007d8",
                "idTipoTelefono": "9df4d140-bbb5-4d44-98fb-63dd7674a844",
                "numTelefono": "sample string 3",
                "numExtension": "sample string 4",
                "TipoTelefono": {
                  "$id": "7",
                  "idTipoTelefono": "96523ee6-80ac-49f8-a6e5-444a22bf0ece",
                  "nomTipoTelefono": "sample string 2",
                  "Telefono": {
                    "$id": "8",
                    "$values": [
                      {
                        "$ref": "6"
                      },
                      {
                        "$ref": "6"
                      }
                    ]
                  }
                },
                "Contacto": {
                  "$id": "9",
                  "$values": [
                    {
                      "$ref": "4"
                    },
                    {
                      "$ref": "4"
                    }
                  ]
                }
              },
              {
                "$ref": "6"
              }
            ]
          },
          "Mail": {
            "$id": "10",
            "$values": [
              {
                "$ref": "2"
              },
              {
                "$ref": "2"
              }
            ]
          }
        },
        {
          "$ref": "4"
        }
      ]
    },
    "TipoMail": {
      "$id": "11",
      "idTipoMail": "a8c7204d-4663-4212-934f-5a399f0faaa0",
      "nomTipoMail": "sample string 2",
      "Mail": {
        "$id": "12",
        "$values": [
          {
            "$ref": "2"
          },
          {
            "$ref": "2"
          }
        ]
      }
    }
  },
  {
    "$ref": "2"
  }
]

Sample not available.