function(instanceData)

Updates a record given the serialized form of the data. Returns a promise that resolves to a object that contains the new properties and values of the record.

An example request and response might look like:

connection.updateData( {
    id: 5,
    name: "do dishes",
    createdAt: 1477104548997
} ).then( function( instanceData ) {
    instanceData; //-> {
    //  id: 5,
    //  name: "do dishes",
    //  createdAt: 1477104540000,
    //  updatedAt: 1477104580000
    //}
} );

The following shows how constructor calls updateData and what it does with the response:

// get its raw data
const instanceData = connection.serializeInstance( myInstance );

connection.updateData( instanceData ).then( function( updatedInstanceData ) {
    connection.updatedInstance( myInstance, updatedInstanceData );
} );