{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5156659dde78cbe171a27ad50abb8910dd70e7d38ad8038136077659ad809361",
    "signature": "0x5298f210725c27880d2fe0b7a6809beb34cb3efa0305de0ebb26b25eb4d644303252ac2f73f4d75ead3e25591e51a0839e36ce8b2deeba6464815fe6c0c114561c",
    "signer": "0xcaA5393c9027232f2FC029484dec6bB3b1415A5b",
    "userId": "823717318"
  }
}