addIncidents(newIncidents: Incidents): Observable<Incidents> {
return this.http.post<Incidents>('api/v1/events', newIncidents, {
    headers: new HttpHeaders({
        'Content-Type' : 'application/json'
    })
});

saveIncidents(formValues: any): void {
const newIncidents: Incidents = <Incidents>formValues;
console.log(newIncidents);
this.dataStorageService.addIncidents(newIncidents)
.subscribe(
  (data: Incidents) => console.log(data),
  (err: any) => console.log(err)
);
}

<button type="button" class="btn btn-primary" (click)="saveIncidents()">Submit</button>