Add role to a matter

curl --request POST \
  --url https://api.smokeball.com/matters/{matterId}/roles \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json-patch+json' \
  --header 'x-api-key: <api-key>' \
  --data '{
  "name": "Provider",
  "displayName": "Medical Provider",
  "description": "Client",
  "contactId": "c85d28cb-a760-4627-aa59-0a853c2e65ed",
  "representativeIds": [
    "776e778f-83df-454a-b344-768a862a7e67"
  ],
  "isMatterItemRequired": true,
  "relationships": [
    {
      "name": "Provider",
      "displayName": "Medical Provider",
      "contactId": "c85d28cb-a760-4627-aa59-0a853c2e65ed",
      "representativeIds": [
        "776e778f-83df-454a-b344-768a862a7e67"
      ],
      "isMatterItemRequired": true
    }
  ]
}'

{
  "id": "<string>",
  "href": "<string>",
  "relation": "<string>",
  "method": "GET"
}