{
  "manageEntity": {
    "action": "Update",
    "entityId": "299339626",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaieravf4yqs6xgq5els64lg5jb4l6vypbjijslqlhkqmdilmlxxyurzsq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":300787445},{\"type\":\"playlist\",\"playlist_id\":29410742},{\"type\":\"playlist\",\"playlist_id\":275520215},{\"type\":\"playlist\",\"playlist_id\":1545646795}]}}}",
    "nonce": "0x07ac340a9c9fc03002598109a6d96b8b4fe81abebc2466307d840a2f272b7f73",
    "signature": "0x8f78f271bd07ea3824a91e9f3b15a9704a7017590823389ea26e5a8adfd63b3b4c33b2705209e0156fa7589d33ec409afa859d3c8f1152fa882c66c07742fe6a1b",
    "signer": "0x8B88e5d2b2c544e566c23f8447d80C8AAdb156eb",
    "userId": "299339626"
  }
}