mutation CreateAccessGrant($input: AccessGrantInput!) {
  createAccessGrant(input: $input) {
    id
    object
    status
    livemode
    created
    updated
    grantor
    grantee
    subjects {
      shipments
    }
    fields
    purpose
    expires_at
  }
}

{
  "input": {
    "grantee": "example",
    "subjects": {
      "shipments": [
        "example"
      ]
    },
    "fields": [
      "example"
    ],
    "purpose": "example",
    "expires_at": 1791302400
  }
}

{
  "data": {
    "createAccessGrant": {
      "id": "grt_1a2B3c",
      "object": "access_grant",
      "status": "active",
      "livemode": true,
      "created": 1791302400,
      "updated": 1791302400,
      "grantor": "example",
      "grantee": "example",
      "subjects": {
        "shipments": [
          "example"
        ]
      },
      "fields": [
        "example"
      ],
      "purpose": "example",
      "expires_at": 1791302400
    }
  }
}