{
  "manageEntity": {
    "action": "Update",
    "entityId": "143893859",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x57c0287f8710505fbf78eb58658c5b53586458ff73f4f206e92ea31c29811c51",
    "signature": "0x50fd36f0ecf6db637d022efd5dbbab23b29354025980fbfdb48bd07d0deb31042cefff73d938b9aab6e1a4b4877a14545297053d8ce5343318a1e1bcdf4385331c",
    "signer": "0xb947c8d74C81F96311AF654D6943a3828370fD24",
    "userId": "143893859"
  }
}