**To add the 'Content-Type: application/json' Mapping Template configured with Input Passthrough**

Command::

  aws apigateway update-integration --rest-api-id a1b2c3d4e5 --resource-id a1b2c3 --http-method POST --patch-operations op='add',path='/requestTemplates/application~1json'

**To update (replace) the 'Content-Type: application/json' Mapping Template configured with a custom template**

Command::

  aws apigateway update-integration --rest-api-id a1b2c3d4e5 --resource-id a1b2c3 --http-method POST --patch-operations op='replace',path='/requestTemplates/application~1json',value='{"example": "json"}'

**To update (replace) a custom template associated with 'Content-Type: application/json' with Input Passthrough**

Command::

  aws apigateway update-integration --rest-api-id a1b2c3d4e5 --resource-id a1b2c3 --http-method POST --patch-operations op='replace',path='requestTemplates/application~1json'

**To remove the 'Content-Type: application/json' Mapping Template**

Command::

  aws apigateway update-integration --rest-api-id a1b2c3d4e5 --resource-id a1b2c3 --http-method POST --patch-operations op='remove',path='/requestTemplates/application~1json'