{
  "manageEntity": {
    "action": "Update",
    "entityId": "531144400",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xa6d2ec7b9e8011cfc67ea2f6efa3a01fb04c9dab40357c39096e37182e4b529d",
    "signature": "0xf98786b6c40ecaa91500ecff3dbfc1e6dcc99006da887e3d621536086ff085a57bfdd7cf5094b1a4082f4d92c79d44d3b6acb3ba96345b206beaa937687bd1d41b",
    "signer": "0xA97e21FA42e7264Dc480723d34E6a61045474c60",
    "userId": "531144400"
  }
}