message: Fix json post format in transaction broadcast for insight API.
diff: @@ -1043,7 +1043,7 @@ export class InsightClient extends BitcoinNetwork {
  }
  broadcastTransaction(transaction: string) {
  - const jsonData = { tx: transaction }
  + const jsonData = { rawtx: transaction }
  return fetch(`${this.apiUrl}/tx/send`,
  {
  method: 'POST',
  