---
title: "PUT /api/graphchain/{chain}/{sdoId}/{attribute}/blobs"
method: PUT
path: "/api/graphchain/{chain}/{sdoId}/{attribute}/blobs"
tags: ["Graph Chain APIs"]
---

# PUT /api/graphchain/{chain}/{sdoId}/{attribute}/blobs

`PUT /api/graphchain/{chain}/{sdoId}/{attribute}/blobs`

<b>Allowed user roles:</b><br/><ul><li>sdzUser</li></ul><br/><br/>Upsert a blob, only works with scalar

## Path parameters

- `chain` string, required
- `sdoId` string, uuid, required
- `attribute` string, required

## Query parameters

- `metadata` string

## Response `200`

OK

- SDOBlobPublic
  - `header` HeaderPublic, required
    - `id` string, uuid, required
    - `timestamp` string, date-time, required
    - `hash` string, required
    - `previousHash` string
    - `type` 'ASSET' | 'CONSENT_CONTRACT' | 'SMART_CONTRACT' | 'CONSENT_CONTRACT_RECEIPT' | 'SMART_CONTRACT_RECEIPT' | 'BLOB', required
    - `operation` 'CREATE' | 'UPDATE' | 'TRANSFER' | 'DELETE', required
    - `owners` string[], required
    - `limitedOwners` string[], required
    - `signer` string, uuid, required
    - `signature` string, required
    - `dictionary` string, required
  - `metadata` object
  - `verifications` object
  - `blob` BlobPublic, required
    - `name` string, required
    - `attribute` string, required
    - `key` string, required
    - `hash` string, required
    - `size` integer, required

---

[API](https://skmtc.net/burstiq/apis/lifegraph-apis.md) · [All operations](https://skmtc.net/burstiq/apis/lifegraph-apis/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/burstiq/lifegraph-apis/versions/381306ef1fcd/schema)