{
  "manageEntity": {
    "action": "Update",
    "entityId": "199516921",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaierab7yhcylddv33wnanfufz3jgy3nnjva4aai74ntgi2rudxp425jxq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":631542371}]}}}",
    "nonce": "0x79f3837c76d3e0ae165b47656e721953be8dd75f36d4f606b26f723bbb4d0db5",
    "signature": "0xd30192a8eeae0293192f71d32fdf0f9424de1e97cb97cd06b7c02fc278fcc28c2b0e684d23bc79aa20edb3797804e1a377f5af588e3182f0fe4dba656caec3de1c",
    "signer": "0x49A438454131D4e8F2A2547287Fc46167b168F47",
    "userId": "199516921"
  }
}