{
  "status": 200,
  "data": {
    "tendencia": "····",
    "previsao": {
      "proximo_mes": ·····,
      "margem":      ····,
      "intervalo": {
        "piso": ·····,
        "teto": ·····
      }
    },
    "historico": [
      {
        "referencia": "··········",
        "valor":      ·····,
        "flutuacao": { "diferenca": ··· }
      },
      {
        "referencia": "··········",
        "valor":      ·····,
        "flutuacao": { "diferenca": ··· }
      },
      ... 58 meses
    ]
  }
}