{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1cdc3666e55ac0824dfe807ea67f0e628ebaa29fde0f5b0c301a586566ca9fec",
    "signature": "0x13e1b693d872a7de4567aad823aedb6dc51bd23fd17b79570f2118d7a092ba2f0fa4638b45b2219498ca5bc47de528cdc0cb345ec4f9e1d5bee5e474581dba301c",
    "signer": "0x9a2123e4f1f72df43f9a2EE66626bFDDEc0cd836",
    "userId": "36647701"
  }
}