{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd2f9977182102611c9088734a8cea53cad77b0b22794241a024e4542d7522acb",
    "signature": "0x86a1f25549f7be41343f723de5fcd2517156a301d41d87712552440fc1f76aab69c2525b6c6d469d326e83186b7ff976822b623b4680b2052ec2d30cbfc00e2f1c",
    "signer": "0x5Eb5AA989691dfe5DD4173C5CBf1Ec2f5AbF2415",
    "userId": "779754337"
  }
}