{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xffb05594b499f2f60a91657ff92056f25e388d7cbeeb50b2842111caffd5a378",
    "signature": "0x143af69dfc1bde19f676da5e2f7f8a3ca2bdda8433632a2be002d254fc7e865b696685b783ab7fb2f5b7082b1e45bce73fc90df30ddd73ecf2f2d673dc05fcf81b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}