Potential issue with address book update favorite contacts API endpoint

The id in a favorite contact record is an integer and is not the contact id. It's the ordinal number of a contact in the favorite contact list.

Remember that the update favorite contact API will override the entire favorite contact so you need to read the user favorite contact, then grab the records object from the response, and modify the record member data and use that records object to update the user favorite contact. Here is an example.

// read the user favorite contact 

// Response
response = {
  uri: 'https://platform.ringcentral.com/restapi/v1.0/account/80964xxx/extension/6228832xxx/favorite',
  records: [
    { id: 1, contactId: '18405126001' },
    { id: 2, contactId: '18405126401' },
    { id: 3, contactId: '18405126101' },
    { id: 4, extensionId: '6198663701' }
  ]
}
// Modify the records to change the second contact
var records = response.records
records[1].contactId = "5597152019"

// Then call the API to update the favorite contact using the modified records data.