{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5fbdcc3e58a7697bef79f3bf2b7a3a604bd9876c3e6320235c64da5b381efb41",
    "signature": "0x28a13209d68ca62cd2469e58738d2c2cb5b65c229593beab8b32f73ef74cbd1c51a0309b1f2edf0f0aab229fa3ee8f2f41388b7f5c8c1bec68bf4054329d7fa71b",
    "signer": "0x2F18Dd2cEA7B346F7F93De98489bCbD4c5fc3Eda",
    "userId": "810791021"
  }
}