IP control of Sony TV with HA

Wondering is someone on this thread could assist with a REST API call to change my Sony TV from pictureMode Vivid to Standard (or other mode)? My wife keeps changing the pictureMode when watching TV during the day and I’d like to have the TV change back using an automation if it’s on after sunset. I have Postman for testing but admittedly a bit of a novice.

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Has anybody experienced the TV getting very unresponsive sometimes after using REST commands? Like the TV menus become unusably slow for few minutes and then seems to recover by itself