{
  "manageEntity": {
    "action": "Save",
    "entityId": "140294347",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4aa8d05a10be6887f18ca4518eec2ac0d3581255f668f8328cfef35e9901d082",
    "signature": "0x4d10608965c0142a44d989f1a89201f9c1b662f9205a36f7c1efb7275b674e39594d9f31bc43394609e3dc7ba951aca96d6331b428be2f625b6684220f53d1f61c",
    "signer": "0x92d3aEA782A42D4B044a13a4727af9Aca3a0211F",
    "userId": "12615893"
  }
}