{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x996ce50581cfa2e9cd0836761e1c579de9b51e5b6fe1f89aa859ab8779fdda86",
    "signature": "0x30a683caae734827599389ca8eb982518280f0f6b2ffac246dcc853a7827c5b7578a65b8307d07e35aa125acf6c33d4d829d1a96749430d292e1d0654bb49f9a1b",
    "signer": "0x64BBff771BdA86b42F6fdbBb1f5fd331e6E82f95",
    "userId": "652074676"
  }
}