mutation AddMembersToTier($input: AddMembersToTierInput!) {
  addMembersToTier(input: $input) {
    memberships {
      __typename
      ... on TenantTierMembership {
        id
        tierId
        tenantId
        createdAt {
          __typename
        }
        createdBy {
          __typename
          ... on UserActor {
            __typename
          }
        }
        updatedAt {
          __typename
        }
      }
    }
    error {
      message
      type
      code
      fields {
        field
        message
        type
      }
    }
  }
}

{
  "input": {
    "tierIdentifier": {},
    "memberIdentifiers": [
      {}
    ]
  }
}

{
  "data": {
    "addMembersToTier": {
      "memberships": [
        {
          "__typename": "TenantTierMembership",
          "id": "id",
          "tierId": "id",
          "tenantId": "id",
          "createdAt": {
            "__typename": "DateTime"
          },
          "createdBy": {
            "__typename": "UserActor"
          },
          "updatedAt": {
            "__typename": "DateTime"
          }
        }
      ],
      "error": {
        "message": "string",
        "type": "VALIDATION",
        "code": "string",
        "fields": [
          {
            "field": "string",
            "message": "string",
            "type": "VALIDATION"
          }
        ]
      }
    }
  }
}