UgcPosts -> Posts - linkedin

Question

I've written code which work under unversioned version and it uses ugcPosts api to gets Share/UgcPosts. In response I have thumbnails like below:
UgcPosts - https://api.linkedin.com/v2/ugcPosts/{encoded ugcPostUrn|shareUrn}?viewContext=AUTHOR
{
"author": "urn:li:person:123ABC",
"contentCertificationRecord": "{\"originCountryCode\":\"us\",\"modifiedAt\":1500590592795,\"spamRestriction\":{\"classifications\":[],\"contentQualityClassifications\":[],\"systemName\":\"MACHINE_SYNC\",\"lowQuality\":false,\"contentClassificationTrackingId\":\"B6A8B437D1D5E59D123455F6DCE5B\",\"contentRelevanceClassifications\":[],\"spam\":false}}",
"created": {
"actor": "urn:li:person:123ABC",
"time": 1500590543962
},
"firstPublishedAt": 1500590592702,
"id": "urn:li:ugcPost:123456",
"lastModified": {
"actor": "urn:li:person:123ABC",
"time": 1500590592806
},
"lifecycleState": "PUBLISHED",
"**specificContent**": {
"**com.linkedin.ugc.ShareContent**": {
"**media**": [
{
"media": "urn:li:digitalmediaAsset:123ABDEFHAG",
"status": "READY",
"**thumbnails**": [/**here i can have some thumbnail **]
}
],
"shareCommentary": {
"attributes": [
{
"length": 35,
"start": 66,
"value": {
"com.linkedin.common.CompanyAttributedEntity": {
"company": "urn:li:organization:12345"
}
}
}
],
"text": "Testing a UGC Post!"
},
"shareMediaCategory": "VIDEO"
}
},
"versionTag": "2",
"visibility": {
"com.linkedin.ugc.MemberNetworkVisibility": "PUBLIC"
}
}
But now after "migration" I dont see any option to get thumbnails for retriving posts ...
https://api.linkedin.com/rest/posts/{encoded ugcPostUrn|shareUrn}
and example of respone:
{
"lifecycleState": "PUBLISHED",
"lastModifiedAt": 1634790968774,
"visibility": "PUBLIC",
"publishedAt": 1634790968774,
"author": "urn:li:organization:5515715",
"distribution": {
"feedDistribution": "NONE",
"thirdPartyDistributionChannels": []
},
"content": {
"media": {
"id": "**urn:li:video:C5F10AQGKQg_6y2a4sQ**" - I can see only this, so probably I need to use VideoApi, but if there will be URN:LI:IMAGE ? Then what? How to get thumbnail for URN:LI:Image ?
}
},
"lifecycleStateInfo": {
"isEditedByAuthor": false
},
"isReshareDisabledByAuthor": false,
"createdAt": 1634790968743,
"id": "urn:li:ugcPost:6856810298419044352",
"commentary": "comment on Oct 20",
"adContext": {
"dscStatus": "ACTIVE",
"dscAdType": "VIDEO",
"isDsc": true,
"dscAdAccount": "urn:li:sponsoredAccount:520866471"
}
}
TL:DR :)
How to get thumbnail for urn:li:image ? If I get this in response content from posts, how to get this thumbnail for this type of content. For urn:li:video I guess that I can use VideoApi but for Image ?
I was looking for answer in documentation but without success.