{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x97f7767a62813a183cdf52ca267bdb0232c1c559d17476e95d53e4cdb3421688",
    "signature": "0xf8075e04f061cbb9ffd0d0b8283e8f0b5e39f6285831dbd32e0e5570e1a1c85b6aba7f8eff61a04288445f3622d9686583591edfd1fc57a2dcc5fd0b0f2b82f71b",
    "signer": "0xd0d23fA63D766D7766f499571670347EFbB20759",
    "userId": "295326110"
  }
}