{
  "manageEntity": {
    "action": "Update",
    "entityId": "501884654",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x5ed01278df7651f58686c3c2050ae2202a1948589058976fc35e6ec3b6e5de53",
    "signature": "0xfa9546364765343773ef0db3343d0cebc77aeda585aa208e97d60487ae9efedc062cc46f0b5f671b1e864f0d65d1008fb3bb82a995883a004d165e7065ccb88e1b",
    "signer": "0x5A2921c477F2a6508fe6E575Bd316bfe1407606B",
    "userId": "501884654"
  }
}