{
  "manageEntity": {
    "action": "Save",
    "entityId": "1737238504",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd0e5488e05a703bc6d9a5d5977e830813c7dc1f293a7186e205ef40b70fdd139",
    "signature": "0xf06d23bc53955c69eb679f46dabb6f4f918ed2aa9570bc78fc13c6ebeeb196645d779eca4346874605293a345da887a167fa9a90493cdfc0011d02fb4425e1381b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}