• On the explorer, go to Developer -> Extrinsics

  • Select your newly created account.

  • On the extrinsic dropdown, select dataAvailability.

  • Select the dropdown to create an application key or submit data.

  • Select the dropdown SubmitData and enter the value you wish to submit as part of this transaction using the App_ID or without its default key value as 0. Click on submit transaction.

  • Before sending a transaction using App_ID, it must be created using the createApplicationKey field.

  • On successful inclusion of the transaction, head over to Network -> Explorer. On the recent event list, you should see your transaction. You can click on it and expand it to check out the details.