{
  "manageEntity": {
    "action": "Update",
    "entityId": "521782306",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xa91cd8fca8a4ef32a9ed50231cb368c1ab7ea7ba081586959f56144e3a2549c7",
    "signature": "0x987fb17c4bd78ffc26c087658445a4a429ea2a7676d71ffa0961dc41d749d7cb79203e6c9b5b1781f1991c497017127074927acf2d6f95166964ae76bb7ef5e31b",
    "signer": "0x8F323d0D01390c0D60Ff442Df719D54B65B943E6",
    "userId": "521782306"
  }
}