{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4d1089a505cf0d1409a9fff8c91f4cb92a39d9376760a55c0987a611dec41c9c",
    "signature": "0x6af09010871fca71446f66390c0bd7f484bfe14a8afbbdf6806b7fc54906662e3affc1d38599ae18b446203cd2690c3cc19942ef6b1cab90a709de36e72cb8c11c",
    "signer": "0xaB3cE462B93aaD5C33d048391D69BaBb2C628b27",
    "userId": "232727483"
  }
}