curl --location --request GET '/entities/LeadOpptyContactGroupRelations/'
{
"success": true,
"data": {
"is_delete_protected": false,
"id": "01234567-abcd-dcba-ffff-000000000000",
"is_deleted": false,
"modified": "2019-01-01T00:00:00",
"created": "2019-01-01T00:00:00",
"lead": "http://example.com",
"oppty": "http://example.com",
"color": 1,
"group_position": {},
"lead_oppty_id": "01234567-abcd-dcba-ffff-000000000000",
"name": "string",
"revision": 1
}
}