{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x75b193a0932493ed9a4e5a6f16a599d78582cbac0eacda0c297b973664dc6033",
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    "signer": "0xf7cb5Bb69a63cFcc4E9FEAB1eD8Ba25fcD527B3e",
    "userId": "976458054"
  }
}