{
  "manageEntity": {
    "action": "Save",
    "entityId": "1970606964",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7730c889d3a0f437146430869c914b8f0fc36a22e78c35d4aec2234b9ec80498",
    "signature": "0x36f1aaffc4945c465b3fb28bdee04bb8e5e27283563b6ef6abc8a82c4b263c926af3429c0f8ff97fce68190afedefdf2b21efea7112b7df17c6197ea04f4890e1b",
    "signer": "0xc97A6025Ad8c7Ba1a35Ef7E3A3b88ABc8b2013BF",
    "userId": "666092734"
  }
}