Where you placing the "emailSubject" field exactly in your JSON?
You can specify the the email message and subject by specifying the following fields at the root level (where you "status" is defined):
{
"emailBlurb": "げりト画首ロ百照ょリっ毎現イタヱア掲全らいに",
"emailSubject": "Subject of agreement",
"templateId": "867a37*****",
"templateRoles": [
{
"email": "email@domain.com",
"name": "name_of_person",
"roleName": "Seller"
}
],
"status": "sent"
}
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