POST api/PostMail

[
  {
    "$id": "2",
    "idMail": "245ce29b-0a69-49da-b988-e36351b1d896",
    "mail1": "sample string 2",
    "idTipoMail": "913b9a01-50c8-4a31-bf69-e00dfdfade2e",
    "Contacto": {
      "$id": "3",
      "$values": [
        {
          "$id": "4",
          "idContacto": "7fba9c46-5eb9-4b71-b767-7b284f477283",
          "Paterno": "sample string 2",
          "Materno": "sample string 3",
          "Nombre": "sample string 4",
          "Telefono": {
            "$id": "5",
            "$values": [
              {
                "$id": "6",
                "idTelefono": "384174e6-32c8-48d9-9b95-6a76a575bc74",
                "idTipoTelefono": "48fad76a-d802-46ae-a39a-b680536ebb3d",
                "numTelefono": "sample string 3",
                "numExtension": "sample string 4",
                "TipoTelefono": {
                  "$id": "7",
                  "idTipoTelefono": "d984bdbe-82da-4b97-8166-62eb507bbbfd",
                  "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": {
      "$id": "11",
      "idTipoMail": "6699de48-4ae2-4b91-a5bf-f4d0a4d2f8de",
      "nomTipoMail": "sample string 2",
      "Mail": {
        "$id": "12",
        "$values": [
          {
            "$ref": "2"
          },
          {
            "$ref": "2"
          }
        ]
      }
    }
  },
  {
    "$ref": "2"
  }
]

Sample not available.