[Python] Updating multiple nested Objects in DRF

I have three linked models with many To many field relationship.

I have no ideia how can i update all instances at once.

I would like create three separated serializers, that could update the three instances.

class PlannedChargePriceSerializer(serializers.ModelSerializer):
class Meta:
model = ChargePrice
fields = ['id', 'start', 'end', 'price']

class PlannedChargeSerializer(serializers.ModelSerializer):
prices = PlannedChargePriceSerializer(many=True)

class Meta:
model = Charge
fields = ['id', 'type', 'qtd', 'status', 'prices']

class PlannedSerializer(serializers.ModelSerializer):
charges = PlannedChargeSerializer(many=True)

class Meta:
model = Planned
fields = '__all__'
read_only_fields = ['id', 'date', 'charges']

def create(self, validated_data):
charges_data = validated_data.pop('charges')
planned = Planned.objects.create(**validated_data)

for charge_data in charges_data:
charge_prices_data = charge_data.pop('prices')
charge = Charge.objects.create(planned=planned, **charge_data)

for charge_price_data in charge_prices_data:
ChargePrice.objects.create(charge=charge, **charge_price_data)

return planned

def update(self, instance, validated_data):
# No idea how update multiple nested objects
return instance

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