{
  "manageEntity": {
    "action": "Save",
    "entityId": "1399499253",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0ff838472668b815b6d0801fc0f19df793838cac6111a90f70fdd319667c0931",
    "signature": "0xd2b0ae7fd4da89f37561645c5704ac5dc11233232b43723879bc76b4810dae130525c4e34fc8e54d725f056dac031ffe96dcb4b0f4e6365b487e60c6a8b8b8271c",
    "signer": "0x7D774EC85aCd0FeeD9fd87c46133f3f76181BC72",
    "userId": "204343035"
  }
}