{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd484276044937c9d0babe22863986201acb43ee224bb791dd85e084ffc43154b",
    "signature": "0x8ce1288b251762e3296562c2e2a942dcf093432df57a26e3d9ce8e8e2f8bad0e05b977b90a27c08322e344747a8415a28027dfa367305e52f041966d1ac0ae391c",
    "signer": "0x8103D5e9c3f9Ab21620BC430d56a4aC96262d36C",
    "userId": "404887599"
  }
}