{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x2b05aedf88c3d0c11883680a8f271b209fef9d3fbd6d577762f8e9dd9f5556e0",
    "signature": "0x147e27f551fa42087d492d8686a74199285d7eaba72c66156b9a362b9a0df8391a332325ddd19170539324238a2202533f7e6d8696a00b4ba52162da1377d86e1b",
    "signer": "0xBc3A9a9317eeA7f35feb992242360A3Bb8D6047b",
    "userId": "587222186"
  }
}