{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x37fa0ab5145ee8aff773f0fa0abda49e88d64200ebc927b29059d9c6cf389c0a",
    "signature": "0x95bdd4bf5e9a0f02b238c5f2216594d8968496045bd5da66d0aeb5e0c5786d2165083403c205cacb63e08969d9221fc15c9d711a47944ec53d7620cbd604870c1b",
    "signer": "0xbf2C76E9a58c7F66D25c8EE7edE947F1eda1e57b",
    "userId": "768244776"
  }
}