{
  "manageEntity": {
    "action": "Update",
    "entityId": "853600751",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xc1dfd664e3f4ff560c688601bd8734c895bb80c915182733acacef96841b61f1",
    "signature": "0x872fe949cc94119088f6c90d03405a8fe2a7ba1ad080e7f954670c56dfc525232e4c126dc82e3f6c6c20d1f71f7133a8353f7f8ffb5678dcfaa34778c541f5cc1c",
    "signer": "0x72B39251a11F08be13E1fCECb325438370DaFF83",
    "userId": "853600751"
  }
}