JSON API - Adjustment method doesn't work

Hello! Im trying to develop some addon for my Hyperian setup. My web app communicate with JSON API.

I've tested some methods and all works fine except this one: Adjustments

I have successful response but none of adjustments are saved.

My Payload:

{
      command: "adjustment",
      adjustment: {
        gammaRed: 1,
        gammaGreen: 1,
        gammaBlue: 1,
        white: [255,255,255],
        red: [255,0,0],
        green: [0,255,0],
        blue: [0,0,255],
        cyan: [128,255,255],
        magenta: [255,0,255],
        yellow: [255,255,0]
      }
    }

and response:

{command: "adjustment", success: true, tan: 0}

In web UI i still see old values after page refresh:

I've tried single adjustment and multiple ones as described in manual - no success.

Please advice what im doing wrong.

Thanks!

Any options to save these adjustments via API?