{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd52dfac8960555dbc175998ba3e9792d370f1d1c1be4a9350abc4126cccc50d7",
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    "signer": "0x0eAa2816D70f9dBAbE3974e29bD34cD184250Aca",
    "userId": "48167987"
  }
}