curl --request PUT \
  --url https://api.sakari.io/v1/accounts/{accountId}/plan \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "name": "<string>",
  "commitment": 123,
  "frequency": "<string>"
}
'

{
  "success": true,
  "data": {
    "id": "<string>",
    "name": "<string>",
    "price": 123,
    "credit": 123,
    "pricing": {},
    "commitment": 123,
    "maxCommitment": 123,
    "minCommitment": 123,
    "passThroughPlanEligible": true,
    "billingFrequency": "monthly",
    "includedPhoneNumberCountries": [
      "<string>"
    ]
  }
}