{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x19125953abfcae77df86e55e7a974562e64211cd8ade8cff68e544dc5716b4d2",
    "signature": "0x04b9adfbba7bdd3446a52828997314a690a7d29cc68dcf4328d13e56db8068f10657359f1c7d38bf4411027c2ce3e8da164b4eca1c39f8abbebd54d55c4bf4631b",
    "signer": "0x61b8830FBaba8B7dAacD4324D572630583185735",
    "userId": "800292630"
  }
}