Automation JSON error

[Karen Kelly]

I am struggling to get the code right on a script runner Automation. 

I want to populate the TO (TXT) field with the email addresses of Finance Contacts for a Company selected in field Counterparty (IF) an Insight field.

customfield_10326 = To (TXT)

customfield_10884 = Counterparty (IF)

The structure of The insight schema is as follows:

Counterparty = on its own with an inbound reference Contact, Attributes: Email and Contact_Type where I specify Finance as a Contact Type and Counterparty

If Contact Person is a finance contact, belonging to Counterparty x then populate email address in To (TXT) Field

{
"fields": {
"customfield_10326": [{ "Counterparty": "customfield_10884": "Contact_Type" : "Finance" :
{{issue.customfield_10326.Email.get(0)}}"
}]
}
}

[Karen Kelly]

Have also tried this...

{
"fields": {
"customfield_10326": [{ inboundReferences(Counterparty="issue.customfield_10922", Contact_Type="Finance").get(0).Email}}"
}]
}
}