{
  "schema_version": "1.0",
  "experiment_id": "UNI-EXP-{{NNN}}",
  "purpose": "{{SAMPLING_OR_BLIND_LABEL_ASSIGNMENT}}",
  "algorithm": "{{ALGORITHM}}",
  "implementation": "{{SOFTWARE_AND_VERSION}}",
  "seed_format": "{{INTEGER_HEX_OR_OTHER}}",
  "seed_value": "{{VALUE_OR_RESTRICTED_REFERENCE}}",
  "seed_visibility": "{{PUBLIC_AT_FREEZE_OR_PRIVATE_UNTIL_GATE_4}}",
  "generated_by": "{{ACTOR_OR_SYSTEM}}",
  "generated_at_utc": "{{TIMESTAMP}}",
  "generation_method": "{{DETERMINISTIC_DERIVATION_OR_SECURE_RANDOM_SOURCE}}",
  "input_manifest_sha256": "{{HASH}}",
  "output_sha256": "{{HASH}}",
  "custodian": "{{ROLE}}",
  "notes": "A restricted seed stays in the Private Research Package. Disclose only according to the frozen preregistration."
}