{
  "manageEntity": {
    "action": "Save",
    "entityId": "37967",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x8f08637ad1cc0eee9e9e92c70515e26bc85e42d1ddad80fe2f0f5371891bd2ab",
    "signature": "0x9e50bc256a3abccd1265bcef273a8bb8c1b8dcc20a1a6605a6b5f861712c2bab59e392ae4284c34bbef3d39c025c702f815e057e5857f0a0b1ac62c19493afa31b",
    "signer": "0xdf555AE1cDda83689Ca8307CbD9048AF27b89b69",
    "userId": "208431511"
  }
}