{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd0cacd585421688af36149677cd7eb2563b000c601a422ad4dfa4ab0440c82ae",
    "signature": "0x3ba7fbc52573e8e673e244eb9d9c8926862ecd8e8a032c0ea37872af17aa4481326ccf8d21da201e42bb0678c49bd848c60a42e48d65800c0985aa58c175abf31b",
    "signer": "0xdEDe0DE467D1dC3649612b93Ac4F7ac2538f97fD",
    "userId": "974097067"
  }
}