{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x91a9337b832946923e72da54583a6447b1ff7c3e3148044bcfd35323e70c5653",
    "signature": "0x5d0e11ca03363db45111e2f564def8def585fc6294884cab1bb894995a5ae5a8552878fd4f9678b4a4e688edefedcffa74b2147d62894278df6f5619251340c31b",
    "signer": "0x5A2b21D1d4240B0d6eC130512D4b578aec735125",
    "userId": "862976792"
  }
}