{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x97b1155ebbe53fb5310901c4c3b928e16775197133b377fef9d1238f53610c0f",
    "signature": "0xd0c68482e1a628697cc0aefe6b60a224d68d233481fdbd4720de793bdc3149e62dc53c0aa22998bb20c4630cb18338d0c7719655360c0df6c9e6dffd07438ffa1c",
    "signer": "0x6c1C8d036b3c0119e31Edb58B17D120E6e91C833",
    "userId": "206524150"
  }
}