{
  "manageEntity": {
    "action": "Update",
    "entityId": "750901803",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xad093a7e2ceea81e9281a18d9cea1a2d6e174fb95a654c636f0740dc9015332f",
    "signature": "0xd08108d90227c293ff31ea75b8501b8d1e7f575c533cacb9b35fbe44b71dd5390af3068064c1afc615b5d06ba6821b4555782398d9139cf43a362851133bac441b",
    "signer": "0x90A203647e830a6BCa374f0203a7d7edf8227684",
    "userId": "750901803"
  }
}