Solution
Salesforce can automatically trigger actions through the onLoadAction URL parameter supported by Adobe Sign for the Agreement button actions: Send, Remind, Delete, Cancel, Update, and View. The URL parameter respects the Toolbar Settings set by the administrator so that only the enabled parameters are available.
Example of different parameter in URLs with onLoadAction:
Send: Ensure that you have an agreement with status Draft in your account.
https://echosign-dev1.ap1.visual.force.com/apex/EchoSignAgreementAdvanced?id=[agreementID]&sfdc.override=1&onLoadAction=send
Remind: Ensure that you have an agreement with status Out for Signature in your account.https://echosign-dev1.ap1.visual.force.com/apex/EchoSignAgreementAdvanced?id=[agreementID]&sfdc.override=1&onLoadAction=remind
Delete: Ensure that you have an agreement with status Out for Signature in your account.https://echosign-dev1.ap1.visual.force.com/apex/EchoSignAgreementAdvanced?id=[agreementID]&sfdc.override=1&onLoadAction=delete
Cancel: Ensure that you have an agreement with status Out for Signature in your account.https://echosign-dev1.ap1.visual.force.com/apex/EchoSignAgreementAdvanced?id=[agreementID]&sfdc.override=1&onLoadAction=cancel
Update: Ensure that you have an agreement with status Out for Signature in your account.
https://echosign-dev1.ap1.visual.force.com/apex/EchoSignAgreementAdvanced?id=[agreementID]&sfdc.override=1&onLoadAction=update
View: Ensure that you have an agreement with status Draft, Out for Signature, Signed, or Canceled in your account.https://echosign-dev1.ap1.visual.force.com/apex/EchoSignAgreementAdvanced?id=[agreementID]&sfdc.override=1&onLoadAction=view
Additional information
The customers can use them in their triggers in Salesforce depending on their requirements.