Interpret Footage and change color space to Rec 709 using script.

Hi there,
Am trying to change color space of mxf footage from rec 2020 to rec 709 using script.

Footage.getFootageInterpretation() gives below object where color space is object property.

ALPHACHANNEL_IGNORE:3
ALPHACHANNEL_NONE:0
ALPHACHANNEL_PREMULTIPLIED:2
ALPHACHANNEL_STRAIGHT:1
FIELD_TYPE_DEFAULT:-1
FIELD_TYPE_LOWERFIRST:2
FIELD_TYPE_PROGRESSIVE:0
FIELD_TYPE_UPPERFIRST:1
alphaUsage:0
colorSpace:[object ColorSpace]
fieldType:-1
frameRate:25
ignoreAlpha:false
inputLUTID:00000000-0000-0000-0000-000000000000
invertAlpha:false
pixelAspectRatio:1
removePulldown:false
vrConformProjectionType:0
vrHorizontalView:0
vrLayoutType:0
vrVerticalView:0

Footage.getColorSpace() gives below object.

empty:false
isSceneReferred:false
matrixEquation:9
name:Rec. 2020
primaries:9
transferCharacteristic:14

Now i want to change color space of footage to Rec 709
Code below

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