I would like to create a template for importing information into odoo. 14.0 

The doubt is on the Payload part, where there is a sub-array containing the message information.

For odoo is it recommended to insert everything in a single record, or is it better to create a link to the table by calling the corresponding payload?

this is json Payload:

{
  "id": null,
  "uuid": "343a6ec2-89c5-498a-9b88-55669d71f6",
  "sender": "20956319",
  "recipient": "9eeb731d-f5ce-4690-87b6-48cb92bd22",
  "messenger": "TG",
  "messenger_id": "32_883148230",
  "payload": {
    "type": "text",
    "text": "test",
    "user": {
      "id": "2096156319",
      "name": "Roberto",
      "image": null
    },
    "timestamp": "2021-12-03T12:19:33+0000"
  },
  "outgoing": false,
  "statuscode": null,
  "result": null,
  "processed": null,
  "sent": null,
  "received": null,
  "read": null,
  "created": null
}

this the model on odoo:

....
    sender = fields.Char('Sender', required=False, help='Sender of this message. Only required if present.')
    recipient = fields.Char('Recipient', help='Recipient of this message. Only required if no identifier present.')
    identifier = fields.Char('Identifier', help='Sender and recipient as a colon-separated string, as in :.')
    uuid = fields.Char('uuid', help='Unique message identifier that can be used to reference the message later on.')
....

Thanks for answer