{
  "manageEntity": {
    "action": "Save",
    "entityId": "1698645899",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x32eba78a88d9e65747ed7f1fdbfa2200b342e12be0d57c095902b7460cd2d1be",
    "signature": "0x5907345cc48d03549d0496c6ebc004a247317c6c0311e682565ddd259ffe38ae1d721fa137fd5876a6126a4917314769ff4afc1a1609289b1c15e4b914fec6431c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}