Please see the previous articles that discuss the Key values in Sage CRM URLs.

PreviousDominantKey = -1;
DominantKey = 0;
CompanyId = 1;  //current company
PersonId = 2;  //person we are CURRENTLY viewing
AddressId = 3; //address we are currently EDITING
UserId = 4; //user for which we are viewing the todo lists
ChannelId = 5; //Team for which we are viewing Team lists
CommunicationId = 6;
OpportunityId = 7;
CaseId = 8;
NoteId = 9;
TeamId = 10;
UserAdminId = 11;
ChannelAdminId = 12;
LockId = 13;
TranslationId = 14;
LibraryId = 15;
ProductId = 16;
CaseProgressId = 17;
OpportunityProgressId = 18;
CompanySearchKey = 19;
PersonSearchKey = 20;
OpportunitySearchKey = 21;
CaseSearchKey = 22;
CommSearchKey = 23;
AccountId = 24;
TargetListId = 25;
OpportunityItemId = 26;
WorkflowRuleId = 27;
WorkflowActionId = 28;
CustomDatabase = 29;
CustomTable = 30;
VisitorId = 31;
UserPrefId = 32;
CampaignId = 33;
WaveId = 34;
WaveItemId = 35;
RecurrenceId = 36;
ForeignTableId = 37;
DataUploadId = 38;
MatchRulesId = 39;
CurrencyAdminId = 40;
ReportId = 41;
ComponentId = 42;
ComponentScriptId = 43;
LeadId = 44;
LeadSearchKey = 45;
WorkflowStateId = 46;
MainWorkflowId = 47;
HelpLinkId = 48;
TransitionId = 49;
InstanceId = 50;
TerritoryId = 54;
LeadProgressId = 55;
LeadOppoMapId = 56;
RuleManagement = 57;
CustomEntity = 58;
TerritoryProfileId = 59;
FilterProfileId = 60;
GenericPage = 61;
ReportSearchID = 62;
CallID = 63;
ForecastID = 64;
CustomViewID = 65;
BusinessCalendarId = 66;
HolidaySetId = 67;
SolutionsId = 68;
SolutionSearchKey = 69;
SolutionProgressId = 70;
OrderID = 71;
LineItemID = 72;
ForecastHistoryID = 73;
SLAId = 75;
OEAdmin = 76;
OEAdminSub = 77;
NotificationId = 78;
PwdSecurID = 79;
ReportFavouriteID = 80;
AdvancedFindID = 81;
KeyWordSearchID = 82;
AccountSearchKey = 83;
OrderSearchKey = 84;
QuoteSearchKey = 85;
QuoteID = 86;
Integration = 87;