NOT DETAILS 2 - Error de sintaxis, JSON mal formado

Notice: unserialize(): Error at offset 77 of 96 bytes in /home/c1150192/public_html/mi_admin_new/apiDetalle.php on line 109

Warning: Invalid argument supplied for foreach() in /home/c1150192/public_html/mi_admin_new/apiDetalle.php on line 109
{"output":{"tipoMaquina":"Maquinas Nuevas","id":"213","archivo":"","vidriera":"1","cuotas":"","categoria_id":0,"categoria":"","subcategoria_id":0,"subcategoria":"","image":"http:\/\/www.maquinaseinsumossrl.com.ar\/assets\/img\/somta__mechas_2.jpg","marca_img":"http:\/\/www.maquinaseinsumossrl.com.ar\/assets\/img\/somta.png","modelo":"Brocas \/ Mechas HSS Somta","linea":"Somta","stock":1,"youtube":"faFi_YX53kY?t=11","informacion_extra":"","caracteristicas_tecnicas":[],"accesorios_especiales":"","accesorios_standar":"","accesorios_opcionales":""}}