{
  "manageEntity": {
    "action": "Update",
    "entityId": "338066643",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaierat5pfleoesvttjabplx63y6cnhjot2blbyk33ymase22idfqxlkrq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":1149351222}]}}}",
    "nonce": "0x3ce5e842cb1c3fdb69600b53651ad29b0ee35d5715146598fad4fc2ccfb42b08",
    "signature": "0x5509abd01a0d8b7485e83690e9c274adc0ecbe103836931ee691ee247ef9ab7b67bd8c60596ce21573d2b90cd33252e46eb2048d69f2516e5c6a29577282f4ff1c",
    "signer": "0x60C5488063d0F71A94513aB00582c8dBd2a37977",
    "userId": "338066643"
  }
}