{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0a4ed25c6ef22a76b440776d1966ef42d38468d2ac2c6838f46adec08e91c00e",
    "signature": "0x97a1bc31590fd0e47b53ad6cd27ccee20da2d29f6f690fc1aaeca25310c0c0c0658844aab8b468fa05acda0539503bbea34899d08a517f7d89e2cd87d84895921c",
    "signer": "0x9A1BEdAbdFEB0a21c6560D4A9ba5fF03431c7f76",
    "userId": "893322803"
  }
}