{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x636138e1d645c678209cb270ecfe8cb4afc065a1ebe09c95d3ce487eea7788a0",
    "signature": "0x28ffd71ded20d873cd94f6cc6645788dc8aa12ad6e5f85a5abc25eedce8d49ba22f7449e346114c243427a2d1d7b717e1a0e3546419ec1fa940b19fc1fa00f001b",
    "signer": "0x184c452b7ebdE50d4A3C2C19A223C813b3F12758",
    "userId": "542976645"
  }
}