{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xdc2e2f98197e66a2cd743f24778dfe942847ff3ff7387d6cef48c7b885d68639",
    "signature": "0x5b775300d052f7bc2a6e1fe93a916f628a70e63cd0ca7779c2a17af9f37a6d10312614d69aabd5fecf7fac2b530c316e9e26f2bbc2a93e11c77aab72f2a64f411b",
    "signer": "0x2E297f3415aa6DcaEB6D1f60e802F38Bc94cd868",
    "userId": "538651626"
  }
}