Https://dev.abdm.gov.in/cm/v1/links/link/init Data input

Hi Team,
Can you please explain the expected input for below request
https://dev.abdm.gov.in/cm/v1/links/link/init
{
“requestId”: “?”,
“transactionId”: “?”,
“patient”: {
“referenceNumber”: “?”,
“careContexts”: [
{
“referenceNumber”: “?”
}
]
}
}