[
{
"contact_id": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
"status": "success"
},
{
"contact_id": "invalid_contact_id",
"status": "error",
"error": "Invalid contact_id"
},
{
"contact_id": "c3d4e5f6-a7b8-9012-cdef-123456789012",
"status": "success"
},
{
"contact_id": "d4e5f6a7-b8c9-0123-defg-h23456789012",
"status": "error",
"error": "Contact not found"
}
]