{
  "manageEntity": {
    "action": "Update",
    "entityId": "603509540",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x7cca6f368b68a312c4b940a3997a51aec420505f548ba4e99f0cc6bedf461eea",
    "signature": "0x2fbf2b372328fd5cab0976f6595062fde5ee38df37b946d84fa597388dc848216d341c0b92d641761c8026c6cb3f593d6ddc45627ebca6a83052b4e903d24c591c",
    "signer": "0xC5d18b553bBB15AF66038908A658cA6d2A61438E",
    "userId": "603509540"
  }
}