{
  "manageEntity": {
    "action": "Update",
    "entityId": "449203874",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x11d1933053f47146ee6f22b28178b6a0c951ae3baa674a951f68932cadc41296",
    "signature": "0x7df8e1aa94c7ed95f74d28642df252a8491bba5009eda430b1f2a2af49bdbf6335a55428ab11c9c63dcfdd7ecbadd42370ab9af6b57948fb67cc4c92e17fe5f71b",
    "signer": "0xF146DAbBEa4a64091535c0e39A419D65150Fa66c",
    "userId": "449203874"
  }
}