Having trouble with REST API; uploading and downloading

[phillip.sauber]

Hello there, im having multiple questions.

So my first question is how exactly does the POST work for uploading a page ? (https://developer.atlassian.com/server/confluence/confluence-rest-api-examples/\) Because i tried it with the same command and changed it to this, but there seems to be no page created.
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C:\WINDOWS\system32>curl -v -u admin:********* -X POST -H 'Content-Type:application/json' -H 'Accept:application/json' -d'{"type":"page","ancestors":[{"type":"page","id":1048581}],"title":"neue testseite","space":{"key":"DAT"},"body":{"storage":{"value":"<p>das ist ein test</p>","representation":"storage"}}}' "http://192.168.162.169:8091/rest/api/content/?os_authType=basic"
Note: Unnecessary use of -X or --request, POST is already inferred.
* Trying 192.168.162.169...
* TCP_NODELAY set
* Connected to 192.168.162.169 (192.168.162.169) port 8091 (#0)
* Server auth using Basic with user 'admin'
> POST /rest/api/content/?os_authType=basic HTTP/1.1
> Host: 192.168.162.169:8091
> Authorization: Basic YWRtaW46dGhpc2lzc3BhcnRh
> User-Agent: curl/7.55.1
> Accept: */*
> 'Content-Type:application/json'
> 'Accept:application/json'
> Content-Length: 155
> Content-Type: application/x-www-form-urlencoded
>
* upload completely sent off: 155 out of 155 bytes
< HTTP/1.1 415
< X-ASEN: SEN-L14026534
< Set-Cookie: JSESSIONID=43D657883008FEE6717F402AC5AABF5C; Path=/; HttpOnly
< X-Seraph-LoginReason: OK
< X-AUSERNAME: admin
< X-Content-Type-Options: nosniff
< Content-Length: 0
< Date: Sun, 11 Aug 2019 11:05:42 GMT
<
* Connection #0 to host 192.168.162.169 left intact
#########################

For my next question i would like to ask about the download of Pages. If i understand it right, my limit is set to 500 maxmimum, even if i try to make it higher. But the more important question for this is, why does start not work ? i tried it out multiple ways and more people seem to have this problem. According to this (https://jira.atlassian.com/browse/CONFSERVER-52558\) the bug should already be solved.

My last question would be how to upload variants for a page since i always fail the XSRF check. I have already googled this problem but no answer provided seems to fix my problem, if u have any ideas for it tell me pls.
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C:\WINDOWS\system32>curl -u admin:*********** -H 'Content-Type:application/json' -H 'origin:http://192.168.162.169:8091' -d '{"attributeValues":{"C0A8A2A9016C7D9A2EDF9CF962083389":{"C0A8A2A9016C7D9A2EDF905C25C63C17":true,"C0A8A2A9016C7D9A2EDFB6BB12596F1F":true,"C0A8A2A9016C7D9A2EDF2564091C5308":true,"C0A8A2A9016C7D9A2EDFA6CD2A2BA9BF":true},"C0A8A2A9016C7D9A49BF06246C06495F":{"C0A8A2A9016C7D9A49BF0E864C82D911":true,"C0A8A2A9016C7D9A49BF30642790FAAF":true,"C0A8A2A9016C7D9A49BFBBDB390F6789":true,"C0A8A2A9016C7D9A49BF732B671D9684":true},"C0A8A2A9016C7D9A67B9F1C40363715A":{"C0A8A2A9016C7D9A67BA50B17C34CF81":true,"C0A8A2A9016C7D9A67BA3F2544F3DE12":true,"C0A8A2A9016C7D9A67BAE362605B2B76":true,"C0A8A2A9016C7D9A67BAD75278AA7C98":true},"C0A8A2A9016C7D9929769504599E4952":{"C0A8A2A9016C7D992977D06555D2F28B":true,"C0A8A2A9016C7D992977F68E5D2EF686":true,"C0A8A2A9016C7D992977E7BA046CAE03":true,"C0A8A2A9016C7D9929772EE92F93B67A":true},"C0A8A2A9016C7D98FD4D1E1115EE96DD":{},"C0A8A2A9016C7D9929769504599E4952":{},"C0A8A2A9016C7D99863FBAA103D9DA6E":{},"C0A8A2A9016C7D99A2DB72E7427EB773":{},"C0A8A2A9016C7D99C64C14A049576D0B":{},"C0A8A2A9016C7D99E948207A3FEA18A3":{},"C0A8A2A9016C7D9A1355A00863F4636F":{},"C0A8A2A9016C7D9AE489A1B000F405B1":{},"C0A8A2A9016C7D9C61181BD70367DDA2":{},"C0A8A2A9016C7D9CAFFEB0132F5F61E1":{},"C0A8A2A9016C7D9CD994C8132AED0FF8":{}}}' http://192.168.162.169:8091/rest/scroll-versions/1.0/metadata/page/2232692
XSRF check failed [THIS LINE IS THE RESPONSE]
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Greetings Phillip