{
  "manageEntity": {
    "action": "Save",
    "entityId": "121295",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x748b8b69fc8f2e9fc19546f59bb5cb799854651d6dcbbf5d06afc8d8a7a7a660",
    "signature": "0xe32454b680317a81eab709aeb711fee111c8d6c18a0f60f07e54dfc7fdec8d105c8e93629381488f8dbacca336e1ba57fccf07c3233509436c4d4efc31829fad1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}