{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x037b676af41449dacd76c1f8cb37d8633a71f850c1ed1ae38c79e486dea67c8e",
    "signature": "0x456ad5452da045429f90bb2537a07c711da3e2383f9abde39844974c8f14a9554160c3063352624f782dd6696f111a61415171a3f25a4debc2c4f957881dbaba1c",
    "signer": "0x9cB833243e283F89D7515e148f9C1bD6E1B98581",
    "userId": "755651302"
  }
}