How do we read the POST data via Ruby platform?

I am trying to use Sinatra (Ruby) to read the Jotform POST data.

But All I get is the raw multipart data. Can anyone assist?

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Content-Disposition: form-data; name="formID"

3456789

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Content-Disposition: form-data; name="submissionID"

3456789

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Content-Disposition: form-data; name="webhookURL"

url

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Content-Disposition: form-data; name="ip"

0.0.0.0

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Content-Disposition: form-data; name="formTitle"

Title

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Content-Disposition: form-data; name="pretty"

data

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Content-Disposition: form-data; name="username"

asdfghj

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Content-Disposition: form-data; name="rawRequest"

{"slug":"submit\/\/","q13_dashboardUserID":"","q12_0":"@live.com","q15_dashboardMobile":"","q16_dashboardUsername":"","q17_dashboardGin":"","q3_1":"28 - 35","q4_2":"R20 000 - R30 000","q5_3":"Married","q6_4":"Yes","q7_5":"","q8_6":"software engineer","q9_7":"Yes","q10_8":"3","q11_9":{"area":"","phone":""},"preview":"true"}

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Content-Disposition: form-data; name="type"

WEB

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This is a re-post of a comment on How to Post Submission Data to Thank You Page