Below is the sample code and error: curl --location --request POST 'https://api.constantcontact.com/v2/contacts?action_by=ACTION_BY_VISITOR&api_key=ABC' \ --header 'Authorization: Bearer ******-****-****-****-fe6ece0ea069' \ --header 'Content-Type: application/json' \ --data-raw '{ "email_address": { "address": "test1142021@test.com", "permission_to_send": "implicit" }, "first_name": "test", "last_name": "test" }' Error: [ { "error_key": "json.field.invalid", "error_message": "#/email_address: Property was found but is not permitted at this location." }, { "error_key": "json.field.missing", "error_message": "#/email_addresses: Property is required but not found." } ]
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