{
  "manageEntity": {
    "action": "Save",
    "entityId": "2111142770",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd644e785ed8ba39fd5b3b83bf596aff23db3443e8c2357ece6505d99c48320bb",
    "signature": "0x7d81fc6234f9b4860cb7746ce684f6943b601fc64ace09dd9b4b10fbea262794567db9c20e7e08f0cce3e0edf9fb20b49aff9093db008b1925abc5530b17836a1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}