How to esign an agreement after it has been sent?

I've developed a web app that utilises the Adobe Acrobat Sign API.

I've POSTed my .pdf to the transientDocuments enpoint:

https://api.eu1.documents.adobe.com/api/rest/v6/transientDocuments

Then create and agreement with the transient document id, recipient email (my own Adobe account) and other relevant information in the JSON packet and POST that to the endpoint:

https://api.eu1.documents.adobe.com/api/rest/v6/agreements

At this point the document is now in listed in my account under the manage tab > waiting for you. It has the options of 'Open', 'Fill' and 'Add Notes'.

At this point I don't receive an email for the document being posted. I want to add a signature and sign it but there is no sign option and clicking 'Fill' shows a spinner briefly then does nothing.

How can I esign the document after it has been uploaded?

How do I ensure I receive an email notification that the document has been uploaded?

How can I get a confirmation when it is esigned?

Thanks,

Ben