Can pydantic change input JSON structure?

Question

I need to put some params in detached unit like in example:

{
par1: 'val1'
par2: 'val2'
par3: 'val3'
par4: 'val4'
} 

to this:

{
par1: 'val1'
par2: 'val2'
params:[
par3: 'val3'
par4: 'val4'
]
}

Is there a way to make it with pydantic?