post https://api-ext.getsigneasy.com/v2/signing/url/
This API is used for embedded sending and self signing of an original file. This API returns an URL which lets you either open the document for signing it yourself or for request signature. If you choose request signature, you will also be able to add fields, or use templates to initiate the signature request.
Version is v2!
The version to be used for this API is v2, not v1.