SpiceDB is an open source, Google Zanzibar-inspired, database system for creating and managing security-critical application permissions.

SpiceDB

This is the message {
  "updates": [
   {
      "operation": "OPERATION_CREATE",
      "relationship": {
        "resource": {
          "objectType": "document",
          "objectId": "001"
        },
        "relation": "reader",
        "subject": {
          "object": {
            "objectType": "user",
            "objectId": "elisa"
          }
        }
      }
    }      
  ]
}