{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5df1a9c88b543213c4028c653762575c7d5558c4a43473f4ab3c3411c2d33cf7",
    "signature": "0xa783eec75c802c4054a0aaa9a725ed5688f2c82a37eb60c2d2b77640aed7688777c2b3ffb83a143eac08a34ffd2b29dbe3a8cb4e181a4f6ef4864c2ec9474ef71b",
    "signer": "0x547248A3D4550ccebbCD7b50a69417753fB15256",
    "userId": "79733524"
  }
}