curl --request POST \
  --url https://virtserver.swaggerhub.com/BangoProducts/Subscriptions-API/1.4.0/plan \
  --header 'Authorization: Basic <encoded-value>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "productName": "bango-music",
  "planName": "bango-music-3-months-free",
  "planPhases": [
    {
      "price": {
        "amount": 0,
        "currency": "USD"
      },
      "sequence": 0,
      "billDescription": "Bango Music 3 months on us",
      "duration": "P3M"
    }
  ]
}
'

const options = {
  method: 'POST',
  headers: {Authorization: 'Basic <encoded-value>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    productName: 'bango-music',
    planName: 'bango-music-3-months-free',
    planPhases: [
      {
        price: {amount: 0, currency: 'USD'},
        sequence: 0,
        billDescription: 'Bango Music 3 months on us',
        duration: 'P3M'
      }
    ]
  })
};

fetch('https://virtserver.swaggerhub.com/BangoProducts/Subscriptions-API/1.4.0/plan', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://virtserver.swaggerhub.com/BangoProducts/Subscriptions-API/1.4.0/plan"

payload = {
    "productName": "bango-music",
    "planName": "bango-music-3-months-free",
    "planPhases": [
        {
            "price": {
                "amount": 0,
                "currency": "USD"
            },
            "sequence": 0,
            "billDescription": "Bango Music 3 months on us",
            "duration": "P3M"
        }
    ]
}
headers = {
    "Authorization": "Basic <encoded-value>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

{
  "responseCode": "OK",
  "responseMessage": "Success",
  "planId": "123e4567-e89b-12d3-a456-426614174000",
  "productName": "bango-music",
  "planName": "bango-music-3-months-free",
  "planPhases": [
    {
      "type": "TRIAL",
      "billingPeriod": "MONTHLY",
      "price": {
        "amount": 0,
        "currency": "USD"
      },
      "sequence": 0,
      "billDescription": "Bango Music 3 months on us",
      "duration": "P3M"
    }
  ]
}

{
  "responseCode": "BAD_REQUEST",
  "responseMessage": "Invalid request"
}

{
  "responseCode": "UNAUTHORIZED",
  "responseMessage": "Invalid access credential"
}

{
  "responseCode": "ALREADY_EXISTS",
  "responseMessage": "A plan with the same name already exists"
}

{
  "responseCode": "TOO_MANY_REQUESTS",
  "responseMessage": "Request limit reached. Please try again later"
}

{
  "responseCode": "INTERNAL_ERROR",
  "responseMessage": "The server encountered an unexpected condition which prevented it from fulfilling the request"
}

{
  "responseCode": "SERVICE_UNAVAILABLE",
  "responseMessage": "The server is undergoing maintenance and is not available. Please, try again later"
}