gistfile1.txt

POST /role_assignments

    {"role_assignment": {
        "user" {
            "id": "1"
        },
        "role": {
            "id": "2"
        },
        "scope": {
            "domain": {
                "id": "3"
            },
            "project": {
                "id": "4"
            }
        }
    }

--> {"role_assignment": {"id": "A", ...}}


POST /role_assignments

    {"role_assignment": {
        "user" {
            "id": "1"
        },
        "role": {
            "id": "2"
        },
        "scope": {
            "domain": {
                "id": "3"
            },
            "project": {
                "id": "6"
            }
        }
    }

--> {"role_assignment": {"id": "B", ...}}


DELETE /domains/3/users/1/roles/2


GET /role_assignments/A

    {"role_assignment": {
        "id": "A",
        "user" {
            "id": "1"
        },
        "role": {
            "id": "2"
        },
        "scope": {
            "project": {
                "id": "4"
            }
        }
    }


GET /role_assignments/B

    {"role_assignment": {
        "id": "B",
        "user" {
            "id": "1"
        },
        "role": {
            "id": "2"
        },
        "scope": {
            "project": {
                "id": "6"
            }
        }
    }