{
  "manageEntity": {
    "action": "Save",
    "entityId": "607857797",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x09922f129c1323f80b1defd527d2907b6452e1daa5ebc8e8c32a2763fb365c20",
    "signature": "0x597c86f07426e8c25f741d01ea723aed9f9b629c5b90401de4f4003eebbdced722416f83315ba7993e18b27ff88209111c9fd7aa0c08d8e0d1cc49e736c815b01c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}