The custom field type Blob supports large text payloads, i.e. exceeding the 255 character limit for string fields.
You can't use blob fields for segmentation or reporting. They are only for use in Ometria email templates.
Note: You can only update this field via API, not via CSV or in the single customer view.
Example:
If your custom blob field is "Personal message" you can send Ometria a paragraph like this:
["Happy Birthday, Alex! I hope this surprise package brings a big smile to your face. I know how much you've been looking forward to your next adventure, and I thought this gear would be perfect for it. Wishing you amazing trails and unforgettable views. Enjoy every moment – Love, Sam."]
Example payload
[
{
"@type": "contact",
"id": "list_of_strings",
"timestamp": "2025-07-01T17:28:10+00",
"email": "trent@example.com",
"@merge": true,
"properties": {
"personal_message": ["Happy Birthday, Alex! I hope this surprise package brings a big smile to your face. I know how much you've been looking forward to your next adventure, and I thought this gear would be perfect for it. Wishing you amazing trails and unforgettable views. Enjoy every moment! Love, Sam."]
}
}
]
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