Example response
HTTP/1.1 200 OK
Content-Type: application/json; charset=utf-8
{
"email": {
"optoutreason": null,
"optoutdate": null
},
"post": {
"optoutreason": null,
"optoutdate": null
},
"sms": {
"optoutreason": "optout",
"optoutdate": "2017-06-15T00:00:00+01:00"
},
"phone": {
"optoutreason": null,
"optoutdate": null
}
}