{
  "manageEntity": {
    "action": "Update",
    "entityId": "668159681",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x20120f00a9a0f06cbb9cbdf3e3350f9ab172439fc37950e4a85e40023088c0b3",
    "signature": "0xf9ac956233a1ae0e25fa034ae2d8d5b5529a9722d59c028e261c7bd5ef2e85f0516566487578cb7a9e76d48794a8326d009ab1cd6f2b8a8692d8450a17afef601b",
    "signer": "0xbfD7C54BBB5F2025f80854451949cf5E3c545F5b",
    "userId": "668159681"
  }
}