Hello, Looking for some advice on how to save data to a bloqs field (ultimately an ansel image),

I’ve got the following, trying to copy what is submitted when an entry is saved through the CP (field_id_50 being my Bloqs field):

$entry = ee('Model')->get('ChannelEntry', 1747)->fields('field_id_50')->first();
$row = [
           'field_id_50' => [
               'blocks_new_block_1' => [
                   'blockdefinitionid' => 8,
                   'order' => 1,
                   'draft' => 0,
                   'values'=> [
                       'col_id_14' => 'hero--simple',
                       'col_id_13' => [
                           'placeholder' => 'placeholder',  
                       ]
                   ]
               ],
               'tree_order' => [ 
                   (object)array(
                    "id" => "blocks_new_block_1",
                    "name" => "Hero",
                    "definition_id" => 8,
                    "parent_id" => null,
                    "parent_definition_id" => null,
                    "depth" => 0,
                    "lft" => 1,
                    "rgt" => 2)
                ],
                'blocks_new_block_0' => [ 
                    'values' => ['col_id_9' => null],
                    'blockdefinitionid' => 6,
                    'order' => 2,
                    'draft' => 0,
                    'values' =>[
                        'col_id_14' => 'hero--simple'
                    ],
                    'values' =>['col_id_13' => [
                        'placeholder' => 'placeholder'
                        ]
                    ],
                    'blockdefinitionid' => 8,
                    'order' => 3,
                    'draft' => 0,
                    'values' =>[
                        'col_id_2' => [
                            'placeholder' => 'placeholder'
                        ]
                    ],
                    'blockdefinitionid' => 2,
                    'order' => 4,
                    'draft' => 0,
                    'values' =>['col_id_4' => null],
                    'values' =>['col_id_11' => 1],
                    'blockdefinitionid' => 4,
                    'order' => 5,
                    'draft' => 0,
                ]
           ]
       ];
$entry->set($row);
$entry->save();

I get no errors, but no Bloqs row is created.