{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3e3b761ba7ef13caa7f994a8031df96debfcdba5552794b46d2d37b369ee3b40",
    "signature": "0x254069e4cb3fcbc8bd30fa4b930d45b2341c54ee61b54351ec3814c45e70aa08065483cdb68d0a0bd7fc217d4f225dd421e493d57327b052479fede5279dd5611b",
    "signer": "0xbfAE206f70d778Ab443F3942EA87145142a20a48",
    "userId": "254836537"
  }
}