{
  "manageEntity": {
    "action": "Update",
    "entityId": "370091516",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x44f38df049fbe9c8dab9b047509c8aa9a1d0b8cc8bce614f942590941c2d72c9",
    "signature": "0xd5ddced53e8dbd5f960c19d283f741d6e7ffda1bcc6b9da70dd51d1abf6814ba4592befa363f706d960e5607eb9929d0d7a0bc8c62cdd99770e9ba147dcec9691b",
    "signer": "0x15B9643abE09bd37C52a5BD1dCF938B05b06cBFB",
    "userId": "370091516"
  }
}