POST api/PostMail

[
  {
    "$id": "2",
    "idMail": "00d72a82-4dee-42dd-8286-3121e3c8bdfb",
    "mail1": "sample string 2",
    "idTipoMail": "95b2c325-0dc6-44fc-bbdf-114d848897ea",
    "Contacto": {
      "$id": "3",
      "$values": [
        {
          "$id": "4",
          "idContacto": "4795cafc-a50e-4835-a09b-33d044d6acbc",
          "Paterno": "sample string 2",
          "Materno": "sample string 3",
          "Nombre": "sample string 4",
          "Telefono": {
            "$id": "5",
            "$values": [
              {
                "$id": "6",
                "idTelefono": "250df70a-3170-4ced-b6ed-320962ce44ba",
                "idTipoTelefono": "8d56642f-2760-49b6-83dd-3fbf2256b558",
                "numTelefono": "sample string 3",
                "numExtension": "sample string 4",
                "TipoTelefono": {
                  "$id": "7",
                  "idTipoTelefono": "725f7824-7b3e-4d3b-962f-fb6107c939ac",
                  "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": {
      "$id": "11",
      "idTipoMail": "c376f155-0a76-49fa-b565-e7b37c1dbbbf",
      "nomTipoMail": "sample string 2",
      "Mail": {
        "$id": "12",
        "$values": [
          {
            "$ref": "2"
          },
          {
            "$ref": "2"
          }
        ]
      }
    }
  },
  {
    "$ref": "2"
  }
]

Sample not available.