if ( !is_array( $blob ) ||
!isset( $blob['metadata'] ) || !is_array( $blob['metadata'] ) ||
!isset( $blob['data'] ) || !is_array( $blob['data'] )
if ( !is_array( $blob ) ||
!isset( $blob['metadata'] ) || !is_array( $blob['metadata'] ) ||
!isset( $blob['data'] ) || !is_array( $blob['data'] )