Add a tag to contact

Create a contact tag object

POST /contactTags (Example REQUEST)

{
	"contactTag": {
		"contact": "1",
		"tag": "20"
	}
}

POST /contactTags (Example RESPONSE)

{
	"contactTag": {
		"cdate": "2017-06-08T16:11:53-05:00",
		"contact":"1",
		"id":"1",
		"links":{
			"contact":"/1/contact",
			"tag":"/1/tag"
		},
		"tag":"20"
	}
}