{
  "manageEntity": {
    "action": "Update",
    "entityId": "721987098",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x452bce950989f5952ef2e778d8fddf005a24e82d407925fed4d04c618f7f514b",
    "signature": "0xd64109157cbc96e67437409c0e87c25b2315b766083d5935bdfc60662cd28e6733456743de49b0e97d8577b64e721a912d0b04d134486d0934a50d77b3b792691b",
    "signer": "0x4c2B6D597D288449d9F215489E66f1cCe1c85B8F",
    "userId": "721987098"
  }
}