Display payload of rest_command

I want to upload my energy data to PvOutput and use a rest_command. However, something is going wrong that I can’t put my finger on. So I would like to look at the content payload of the rest_command. Below is the rest_command.

rest_command:
  upload_to_pvoutput:
    url: https://pvoutput.org/service/r2/addstatus.jsp
    method: POST
    headers:
      X-Pvoutput-Apikey: !secret pvoutput_api_key
      X-Pvoutput-SystemId: !secret pvoutput_system_id
      Content-Type: application/x-www-form-urlencoded
    payload: >-
        d={{ now().strftime('%Y%m%d') }}
        &t={{ now().strftime('%H:%M') }}
        &c1=1
        &v1={{ states('sensor.p1_meter_energy_export')| int }}
        &v3={{ states('sensor.p1_meter_energy_import')| int }}
        &v4={{ states('sensor.p1_meter_power') | int }}
        &v5={{ states('sensor.temperatuur') | float }}

Thanks for the answer.

Fond it in the logs.