curl --request POST \
  --url https://{server-url}/message/sendMedia/{instance} \
  --header 'Content-Type: application/json' \
  --header 'apikey: <api-key>' \
  --data '{
  "number": "<string>",
  "options": {
    "delay": 123,
    "presence": "composing"
  },
  "mediaMessage": {
    "mediaType": "image",
    "fileName": "evolution-api.pdf",
    "caption": "<string>",
    "media": "<string>"
  }
}'

{
  "key": {
    "remoteJid": "553198296801@s.whatsapp.net",
    "fromMe": true,
    "id": "BAE5F5A632EAE722"
  },
  "message": {
    "imageMessage": {
      "url": "https://mmg.whatsapp.net/o1/v/t62.7118-2...",
      "mimetype": "image/png",
      "caption": "Caption text",
      "fileSha256": "VbCGkGBv5SZStLD5PHdkBWpQav/lNsXcY...",
      "fileLength": "1305757",
      "height": 1080,
      "width": 1920,
      "mediaKey": "aFQK9Ocw5tE7Nf0iBA42Xcb4Dee6G1k/pLL...",
      "fileEncSha256": "bGVtYeR3458RwC0p1tsGDNuj+vOu/...",
      "directPath": "/o1/v/t62.7118-24/f1/m232/up-oil...",
      "mediaKeyTimestamp": "1717775573",
      "jpegThumbnail": "/9j/2wBDABALDA4MChAODQ4SERATG...",
      "contextInfo": {}
    }
  },
  "messageTimestamp": "1717775575",
  "status": "PENDING"
}