userName: refers to the name of the user we intend to send the message
wa_id: refers to the WhatsApp number of the user we intend to send the message NOTE: The number must contain the country code without the plus sign
templateId: refers to the ID of the template NOTE: Template must be approved before using this API
assingTo : refers to the email of custom user or agent.
params: is used for the variables used in the template, it is an empty array in the case of a plain text template with no variables. In case of variables in the template, please refer to the JSON below
tags: refers to label you can assign to conversations or chats to help organize and manage effectively.