Hey @RomanRRR,
Using the same example @MutedJam posted the other day you would need to change the second HTTP Request node to POST then set the body to match the data that needs to be sent. Looking at the Strapi API documentation you would need to send the below to create your content.
{
"data": {
"title": "Hello",
"relation": 2,
"relations": [2, 4],
"link": {
"id": 1,
"type": "abc"
}
}
}
For updating it would be the below but the URL would need to include the ID for the item you want to update.
{
"data": {
"title": "Hello",
"relation": 2,
"relations": [2, 4],
}
}
This in theory will give you something like the 2 untested workflows below, You will need to make some changes to the URLs, IDs being used and possible some of the data being sent but it should get you on the right track.