{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xad5a8985e390a8d0d0173768d6b5b965ee7ab053148f720e641cc565a294f36a",
    "signature": "0xff3b14bee89e0c52dfa8a453c59dc3e424a487f9c3897bed670ed1a2f8b503ae3e20c953217ad225940192a911d59cf303fa0e38c146d2f49e8a3f533675bb441b",
    "signer": "0x931ab53B0CeD77e2584e0e38544B122E2c0e6ea1",
    "userId": "751293877"
  }
}