Vou exemplificar aqui, um Pix recebido:
{"pix": [{"endToEndId": "E18236120202102041801s0314386DGX", "txid": "4d4e0d68aecf4a4f94474d3e2d5cba5e", "chave": "7441-a91e-4982-8c25-6105581318ae", "valor": "0.01", "horario": "2021-02-04T18:01:15.000Z"}]}
Devolução refente ao mesmo Pix:
{"pix": [{"endToEndId": "E18236120202102041801s0314386DGX", "txid": "4d4e0d68aecf4a4f94474d3e2d5cba5e", "chave": "7441-a91e-4982-8c25-6105581318ae", "valor": "0.01", "horario": "2021-02-04T18:01:15.000Z", "devolucoes": [{"id": "hsdjahjsuyturp", "rtrId": "D090893562021020418013f3993b68ca", "valor": "0.01", "horario": {"solicitacao": "2021-02-04T18:01:43.000Z", "liquidacao": "2021-02-04T18:01:44.000Z"}, "status": "DEVOLVIDO"}]}]}