{
  "manageEntity": {
    "action": "Save",
    "entityId": "1881282410",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xbdd94cf715ff9a08779a97d5792a5704e53707a669ba4a0a8dfb1630ec9880c2",
    "signature": "0x52d53c37b8eecead81dc30ef78b9b53df3b127cfea7f9cba5e7c8a088c49a35a58446bc8f7cb3ef1e85fd6f40a57a1e2ca12fc288b80a9283ea463e4f74aa7511b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}