curl --request GET \
  --url https://your-tenant.bloodhoundenterprise.io/api/v2/relationships/{relationship_id} \
  --header 'Authorization: Bearer <token>'

{
  "data": {
    "relationship_id": 1234567890,
    "source_node_id": 1234567890,
    "target_node_id": 1234567890,
    "kind": {
      "relationship_kind_id": 123,
      "name": "<string>"
    },
    "properties": {}
  }
}