{
  "manageEntity": {
    "action": "Save",
    "entityId": "9601",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb33227e519a0a7434c8f23a10efa73eee0e46f5afd711059fb47b3c517f018d4",
    "signature": "0xde2bad6d998cfe26bfda7d295a3a98847d5a6414d6fbdbcfbe81efc5c0f134af4705ea0ca055a958c5378026c9b58205a8c6173071acd6aee830fa1cee97ce391b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}