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.