curl --request POST \
  --url https://api.example.com/api/DocumentGeneration/Placeholders \
  --header 'Content-Type: application/json' \
  --data '
{
  "entityId": 123,
  "playerId": 123,
  "useLatestRate": true
}
'

[
  {
    "placeholder": "<string>",
    "placeholderUsage": "<string>",
    "friendlyName": "<string>",
    "value": "<string>"
  }
]