POST /v2/clients/:id/reporting-entities Create a new reporting entity owned by a client. Path params: id (required) — Client identifier. Request: { "data": { "type": "reporting-entity", "attributes": { "name": "string (required)" } } } Response (201 Created): { "data": { "id": "string", "type": "reporting-entity", "attributes": { "name": "string" }, "relationships": { "client": { "data": { "type": "client", "id": "string" } }, "portfolios": { "data": [] } } } }