{
  "manageEntity": {
    "action": "Update",
    "entityId": "500138887",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x4cd465e1669ba111913370db82a4e81d97e8d36d15c4cc8c1830a8f48358a2da",
    "signature": "0x39d53f3faceed18c31e6b58598851ff1f53e864d148844526221fb8647e573855dca07d036f5756f5dd71af4261379ac9a8d263643d8cff9998ad5d23f22964d1c",
    "signer": "0xB40D00E36403aF3B4bdb29a43BEaE33057EE4129",
    "userId": "500138887"
  }
}