{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9b2fc3ca904b361b4fceff5976bc1a4860a648bd8c452916a2db51b25d98f347",
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    "signer": "0x9976815585C2991FDF41607Ac075A4Dc161C0BdE",
    "userId": "260693348"
  }
}