{
  "manageEntity": {
    "action": "Update",
    "entityId": "218137599",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xac487b7864eb3aa749526d177441d1f6cff3ca2aa17c177f20a506d95f5fb516",
    "signature": "0x439cfaf653e5415b88ba45e319dd46108839543d90796427a5c43983a64b76fa7116c97d3651dc86bb35a394ff6352887ba1ad56d359377a17cbfb105932e17f1b",
    "signer": "0xA9578D29416BBF3138f94226f84df7f6304053f0",
    "userId": "218137599"
  }
}