A computer-implemented method characterised by: determining, by a consent management module of a client device, that a request for transmission by the client device, on behalf of an application, to a recipient will include user data of a user of the client device, the recipient being a digital component distribution system; in response to determining that the request will include the user data: requesting, from the consent management module of the client device, current user consent settings specified by the user, wherein the user consent settings define at least one of (i) user data that can be transmitted from the client device, (ii) how user data transmitted from the client device can be used or (iii) which recipients can receive and retain user data from the client device; receiving, from the consent management module, the current user consent settings; and generating request data according the current user consent settings, the generating comprising: identifying, by a device platform of the client device and using the current user consent settings, one or more portions of the user data of the user that can be included in the request data; including, in the request data, the identified one or more portions of the user data of the user; including, in the request data, at least a portion of the user consent settings that specify the consents given to the recipient of the one or more portions of the user data, wherein the consents restrict use of the one or more portions of the user data by the recipient; and transmitting the request data to the recipient. determining, by a consent management module of a client device, that a request for transmission by the client device, on behalf of an application, to a recipient will include user data of a user of the client device, the recipient being a digital component distribution system; in response to determining that the request will include the user data: requesting, from the consent management module of the client device, current user consent settings specified by the user, wherein the user consent settings define at least one of (i) user data that can be transmitted from the client device, (ii) how user data transmitted from the client device can be used or (iii) which recipients can receive and retain user data from the client device; receiving, from the consent management module, the current user consent settings; and generating request data according the current user consent settings, the generating comprising: identifying, by a device platform of the client device and using the current user consent settings, one or more portions of the user data of the user that can be included in the request data; including, in the request data, the identified one or more portions of the user data of the user; including, in the request data, at least a portion of the user consent settings that specify the consents given to the recipient of the one or more portions of the user data, wherein the consents restrict use of the one or more portions of the user data by the recipient; and requesting, from the consent management module of the client device, current user consent settings specified by the user, wherein the user consent settings define at least one of (i) user data that can be transmitted from the client device, (ii) how user data transmitted from the client device can be used or (iii) which recipients can receive and retain user data from the client device; receiving, from the consent management module, the current user consent settings; and generating request data according the current user consent settings, the generating comprising: identifying, by a device platform of the client device and using the current user consent settings, one or more portions of the user data of the user that can be included in the request data; including, in the request data, the identified one or more portions of the user data of the user; including, in the request data, at least a portion of the user consent settings that specify the consents given to the recipient of the one or more portions of the user data, wherein the consents restrict use of the one or more portions of the user data by the recipient; and identifying, by a device platform of the client device and using the current user consent settings, one or more portions of the user data of the user that can be included in the request data; including, in the request data, the identified one or more portions of the user data of the user; including, in the request data, at least a portion of the user consent settings that specify the consents given to the recipient of the one or more portions of the user data, wherein the consents restrict use of the one or more portions of the user data by the recipient; and transmitting the request data to the recipient.