Shopify Flow send http requests json body

I need to send an email to customer when and order is created.
The Send http request post body is not json even if I set the header context-type as application/json.
This is the body:
{
“from”: {{“email@gmai.com” | json}},
“to”: {{order.email | json}},
“subject”: {{order.name | json }} ,
“text”: {{“text” | json}}
}

Solved, use multipart/form-data format in the body of the post request without specify the header content-type.

Glad you figured this out @Antonio_Chiuchiolo and thanks for posting your solution for other devs who experience this!