有什么办法url从这个JSON中检索密钥？
{
"data": {
"is_silhouette": false,
"url": "https://fbcdn-profile-a.akamaihd.net/hprofile-ak-xpf1/v/t1.0-1/p200x200/13178742_10205047662871072_6233795154346712405_n.jpg?oh=194b0150c2325660390490779bf9b942&oe=57C22031&__gda__=1472746057_dc9b0557adc8408840fafb73ed325ef8"
}
}
它由Facebook的Graph API提供.我在Delphi 10.0 Seattle中使用Rest Library来检索它.