{
  "manageEntity": {
    "action": "Update",
    "entityId": "739515407",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x27f8fa6e191aa6eb0d0cb31ea55fbb12cbb856b71f4e97c2059818a5a55c60d1",
    "signature": "0x1d743a92313c4bfe9078558e6fb2f768a825a477800c7560f726b1e10b0b7ec531ea0fe8ac231dcd1d77ef05c70703b1babd8bbc573c5c5fb7a734987bd2de041b",
    "signer": "0xAA23121a7f0A35e37A00c90737535F3743a08AE8",
    "userId": "739515407"
  }
}