curl --request POST \
  --url https://api.sandbox.teal.dev/v0/categorization/rules \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'teal-instance-id: <teal-instance-id>' \
  --data '{
  "expression": "t.description == '\''SHELL GAS'\''",
  "ledger_name": "Fuel Expenses",
  "name": "Shell to Fuel Expenses",
  "priority": "100"
}'

{
  "id": "N6ntpvTtiA4L31vVyVat5n",
  "expression": "t.description == 'SHELL GAS'",
  "ledger_name": "Fuel Expenses",
  "name": "Shell to Fuel Expenses",
  "priority": "100"
}