"Subnet Id must be numeric" - post request

[default-u]

hi.
my code on python not work:

phpipam_headers = {'token': 'xxxx', 'Content-Type': 'application/json'}
ipam_post_data = {"subnetId": "52", "ip": "1.1.1.1", "hostname": "testhost-from-api"}
ipam_r = requests.post('https://ipam/api/appname/addresses/', data=ipam_post_data, headers=phpipam_headers)

in response i see:

{
"code": 400,
"message": "Subnet Id must be numeric",
"success": false,
"time": 0.015
}

also curl not working:
curl -X POST -s --header 'Content-Type: application/json' --header 'token: xxxxxxxx' --data {"subnetId": "52", "ip": "1.1.1.1", "hostname": "testhost-from-api"} https://ipam/api/appname/addresses/

curl response:
{"code":400,"success":false,"message":"Subnet Id must be numeric","time":0.012}

i not understand, where is my trouble?

my phpipam version - 1.4.1

[default-u]

maybe this information will help someone - content-type must be set as "application/x-www-form-urlencoded".
my trouble solved :)

[john-okey]

@default-u, thanks!
This post certainly helped my use-case. Just to add to your comments above, another solution would be to use the 'json' keyword argument (instead of 'data') in your requests.post to accomodate the 'application/json' Content-Type -ie:

phpipam_headers = {'token': 'xxxx', 'Content-Type': 'application/json'}
ipam_r = requests.post('https://ipam/api/appname/addresses/', json=ipam_post_data, headers=phpipam_headers)