{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xf92f549a3489a5624115474e83ad099157fd09e15a394cf37dd5f7e28d53be21",
    "signature": "0x7c447fdeab140e1cc22fb7033a1054efba11c0d0effdf8fe5c5bf2467576e1a3418208b1950903fdcc4968206c2e9452493266995624d95a3b5fa16fcd90b83f1c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}