{
  "manageEntity": {
    "action": "Save",
    "entityId": "354476159",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xcd9270d4e856032a7f43f5eb9fba458b29a689167e7795630b5c27e58fab7f9a",
    "signature": "0x383d7e2e8db7970e31b6947f800d885fa22ddb72dfbcaee27c380e21267ca6f33af3fd003ef497e0e160821753df581043a907bb756552f0c6fbd358f524b5c81c",
    "signer": "0xE6a2533061175ED4c7f073A7BE3dc4189A4DE47E",
    "userId": "427249190"
  }
}