{
  "manageEntity": {
    "action": "Update",
    "entityId": "672317359",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xcdca9d2390995dd48ae9e04bf02d5d016411f390b1aad2cb5052707be014a1ed",
    "signature": "0x2a501ec2cde0ff588ecf9a252edf49d18b97a317513cd6cf67d4baecc81430ac65fe95505bb23fbc3a85965bea31311da3ab5d5a10ea0d912ff8b7c0a73dfdc51c",
    "signer": "0x646dCf930B4af805ccBf1e6165f21FCE3A10b9f0",
    "userId": "672317359"
  }
}