Logical content Blobs are encoded as IPLD/CBOR-JSON, and they include a "type" string. The following is an example "type" value of a Terra KeyDelegation blob:
Hypermedia:KeyDelegation
The "type" field can be split :, into the following namespace:
Hypermedia - Hardcoded Protocol Name
TERRA_BLOB_TYPE - The purpose of this blob. One of: