{
  "manageEntity": {
    "action": "Update",
    "entityId": "199516921",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaieraqigo6tjxew434ai7avgujhn4xymrej4hlnwfyr7zpurhyjtxaahq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":631542371},{\"type\":\"playlist\",\"playlist_id\":1638193401},{\"type\":\"playlist\",\"playlist_id\":366181211},{\"type\":\"playlist\",\"playlist_id\":1291205104}]}}}",
    "nonce": "0xa7323a9657e7947a94dd85a4af733f11a61f5885ae9e63cf0de4432d23a81adb",
    "signature": "0x0f5bcc5791dc8d650ba3e1cae5c0d20fce2b49bb28a83eb7ab3c2a0abb894d117f20556912536cb6ce6500af32db778efb2e9c1d5b570a3c8c4a9f96d3510c871b",
    "signer": "0x49A438454131D4e8F2A2547287Fc46167b168F47",
    "userId": "199516921"
  }
}