{
  "manageEntity": {
    "action": "Update",
    "entityId": "737395461",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x64c48c94a3e5a9d05aee323600d60185cb048474523e1dbddf69878c5b042e18",
    "signature": "0xf6574ab8745c3f03817472ff7520935a6fae501067c1808e495e9bc9b68cb4675c370d36394a7f373ab8e49feeaa79a0200ce6e82a0111e9b6a05ff765a96c221c",
    "signer": "0x258a4Cb700805319F50300ebba72383320582E5D",
    "userId": "737395461"
  }
}