A method, performed by a managing node , for managing exchange of information relating to Packet Flow Descriptors, PFDs, between at least one application server and at least one network exposure function, NEF, node of an operator network , wherein the method comprises: receiving a message, originated from the application server , wherein the message comprises a PFD with a PFD identifier, an external application identifier associated with the PFD, a server identifier of the application server originating the message, a T8 transaction reference identifier, TTRI, and a NEF identifier identifying the operator network , storing , in a memory, the PFD associated with the PFD identifier, the external application identifier, the server identifier and the NEF identifier, whereby a set of stored PFDs and associations are obtainable from the memory, selecting , based on the NEF identifier, a NEF node amongst said at least one NEF node , whereby the managing node is configured to forward a PFD, related to the external application identifier, to the NEF node , wherein the method further comprises, when a PFD selection identifier is included in the message: selecting , based on the PFD selection identifier, a further PFD amongst the set of stored PFDs, determining an action to be performed on the selected PFD, wherein the action is one of forwarding, updating and deleting; and transmitting , towards the selected NEF node, the selected PFD and an indication of the determined action, and wherein when a PFD selection identifier is not included in the message, the method otherwise comprises: transmitting , towards the selected NEF node , the PFD with the PFD identifier, the external application identifier, the server identifier and the NEF identifier. receiving a message, originated from the application server , wherein the message comprises a PFD with a PFD identifier, an external application identifier associated with the PFD, a server identifier of the application server originating the message, a T8 transaction reference identifier, TTRI, and a NEF identifier identifying the operator network , storing , in a memory, the PFD associated with the PFD identifier, the external application identifier, the server identifier and the NEF identifier, whereby a set of stored PFDs and associations are obtainable from the memory, selecting , based on the NEF identifier, a NEF node amongst said at least one NEF node , whereby the managing node is configured to forward a PFD, related to the external application identifier, to the NEF node , wherein the method further comprises, when a PFD selection identifier is included in the message: selecting , based on the PFD selection identifier, a further PFD amongst the set of stored PFDs, determining an action to be performed on the selected PFD, wherein the action is one of forwarding, updating and deleting; and transmitting , towards the selected NEF node, the selected PFD and an indication of the determined action, selecting , based on the PFD selection identifier, a further PFD amongst the set of stored PFDs, determining an action to be performed on the selected PFD, wherein the action is one of forwarding, updating and deleting; and transmitting , towards the selected NEF node, the selected PFD and an indication of the determined action, and wherein when a PFD selection identifier is not included in the message, the method otherwise comprises: transmitting , towards the selected NEF node , the PFD with the PFD identifier, the external application identifier, the server identifier and the NEF identifier. <EOS>