{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xad41120037258e21c00f7bc6c762c247b265862d59c836f2ea9b27cef255a243",
    "signature": "0xc1c5d05e37636c032590b3227aeac38dcbb4b4285b6164326d91eb6af8ae702712aba6c3163a8656211db66cf3f6d2c1cba562bcedc62cb9837f672e7eb224c11b",
    "signer": "0x3a4A0b0E56afb03E27Aa24F1b0097dDA38FA58e0",
    "userId": "927391620"
  }
}