the PUT format for boolean or select list :

{
  "field_order_status":{
    "und":["1"]
  }
}

it would be ok.

The PUT format for boolean or select list :

{
  "field_order_status":{
    "und":["1"]
  }
}

it would be ok.

the PUT format for boolean or select list: { "field_order_status":{ "und":["1"] } } it would be ok.

the PUT format for boolean or select list  :

{
  "field_order_status":{
    "und":["1"]
  }
}

it would be ok.