{
  "manageEntity": {
    "action": "Save",
    "entityId": "1901802961",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x50fcc3148e74cff6a56093dae1a34f52cf4c208aa63f2284602c57cbbd4b0c88",
    "signature": "0xbcb837dda52cf5a3518f4a765b927dde451a16fddded8352ff430c6c93a67c4b0c7683a40c8f54336dca8d1a14565d7c7b035a25a8d6fb427859ebc4618b8a471c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}