{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5dadbe3130388063be164067c769c4d862db305ba200d38be4a5acaade873dd8",
    "signature": "0x150a146b0b329054d5cf30e4bb86b229201fd0975b016728fc385e5b727df8ea2561bc22c9c757d4ad06c0ea25dae9eeab1caa46bc6fa147dd1e2e811c5469cd1b",
    "signer": "0x1A4cD71Cb8c06459856FACa017c307D754382b62",
    "userId": "837019248"
  }
}