{
  "manageEntity": {
    "action": "Update",
    "entityId": "784879487",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x31313096e1e8a1344f8789c10fd75b142341e5c58240ec07a4e2f147c85c5e7a",
    "signature": "0x41717a922e58d70f355e8616105e715a5d468ec6aa0e79f3d203d65b0315d5b94273775e26832e62aeb4f346914f8a4ff5ee017f2ea2f344457a1392a14b33841c",
    "signer": "0xcaFF37d75de2d0273bd0e1DE9F138f4b1809708E",
    "userId": "784879487"
  }
}