{
  "manageEntity": {
    "action": "Update",
    "entityId": "839909525",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x5f639fdf2006697c9b502080732e6909a51b86f060d7bfe11188fd06baac0c15",
    "signature": "0xd04f9c0a47f6d8f9c3fd31bff1d85e4f726d32c2f11cf2729b76d14c95637e0532217938ca8fbc1785ad1a80ed18fb4d99dd0bfdccabc8af40e0e0c800c142d61c",
    "signer": "0x1BF18676e3272039E0bF8f2a021954D13cC10a6F",
    "userId": "839909525"
  }
}