{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x35ed017870d050c621e3ceafb59f65daf125d5cad30d07ef1c0eddaf33f775c7",
    "signature": "0x4edbef11b8fdcfe811d581d056eeb7af0cfc4cae545918afba16c5b1a9548f2f15bf05170d718c9c206458a48857ffa340b916beac6b7d7946afdc9785cd4b0a1b",
    "signer": "0x8dFCcCaCC1e622346B954eB5F33A4d06d3b66f81",
    "userId": "654384824"
  }
}