I have an associative array that I want to pass to cURL as POST data. However i have tried multiple things, still it doesn’t work.

The array:

declare -A details
details[name]="Honey"
details[class]="10"
details[section]="A"
details[subject]="maths"

The cURL commands have tried so far (all of these failed):

resp = $(cURL --request POST --data details "https://somedomain.net/getMarks")
resp = $(cURL --request POST --data variables=details "https://somedomain.net/getMarks")
resp = $(cURL --request POST --data "variables=$details" "https://somedomain.net/getMarks") 
resp = $(cURL --request POST --data "variables=${details}" "https://somedomain.net/getMarks") 
resp = $(cURL --request POST --data $details "https://somedomain.net/getMarks") 
resp = $(cURL --request POST --data ${details} "https://somedomain.net/getMarks") 
resp = $(cURL --request POST --data variables=details "https://somedomain.net/getMarks")   

Something like shown below, I want the above request to be (indirectly), however I want to pass the array directly instead of writing its contents.

resp = $(cURL --request POST --data '{"variables":[{"name": "Honey"},{"class": "10"},{"section": "A"},{"subject": "maths"}]}' "https://somedomain.net/getMarks")

Please note that to begin with I will always have the associative array ONLY (not any json array or string).