{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb32d5f5ea305897d8cfbb1e756ab0a167fddbd61cc038e9ca2548c40a966dbcd",
    "signature": "0x0370461241c57031c476ca1b96a509e0105c1b867f49bd55802adea9828f92426604fb67e6926d3175bf2d83972b533e6acffb83f1365ae5c505aac7b3ea139c1b",
    "signer": "0x76433fcfc10E04743aB4EB98660d4B47526AD243",
    "userId": "328228955"
  }
}