Fetch an entry by key

curl --request GET \
  --url https://api.invopop.com/silo/v1/entries/key/{key}

{
  "attachments": [
    {
      "created_at": "2018-01-01T00:00:00.000Z",
      "desc": "Invoice for January 2021.",
      "entry_id": "347c5b04-cde2-11ed-afa1-0242ac120002",
      "hash": "a1b2c3d4e5f6g7h8i9j0k1l2m3n4o5p6q7r8s9t0u1v2w3x4y5z6",
      "id": "<string>",
      "meta": {},
      "mime": "application/pdf",
      "name": "invoice.pdf",
      "size": 12345,
      "stored": true,
      "url": "<string>"
    }
  ],
  "context": "line.item",
  "created_at": "2018-01-01T00:00:00.000Z",
  "data": {},
  "digest": {
    "alg": "<string>",
    "val": "<string>"
  },
  "doc_schema": "https://gobl.org/draft-0/bill/invoice",
  "draft": true,
  "env_schema": "https://gobl.org/draft-0/envelope",
  "faults": [
    {
      "code": "<string>",
      "message": "<string>",
      "provider": "pdf"
    }
  ],
  "folder": "sales",
  "id": "347c5b04-cde2-11ed-afa1-0242ac120002",
  "invalid": true,
  "key": "invoice-101",
  "meta": [
    {
      "created_at": "2018-01-01T00:00:00.000Z",
      "entry_id": "347c5b04-cde2-11ed-afa1-0242ac120002",
      "id": "347c5b04-cde2-11ed-afa1-0242ac120002:source:key",
      "key": "service-id",
      "link_scope": "public",
      "link_url": "https://example.com/info",
      "ref": "<string>",
      "shared": true,
      "src": "source",
      "updated_at": "2018-01-01T00:00:00.000Z",
      "value": {
        "key": "value"
      }
    }
  ],
  "signed": true,
  "snippet": {
    "title": "Sample Title"
  },
  "state": "sent",
  "tags": [
    "<string>"
  ],
  "updated_at": "2018-01-01T00:00:00.000Z"
}