{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd5e32d66fa73f7979401e40c62b10c6ad6439354a429d357034f8cef2c398b5f",
    "signature": "0xddb6e074cceeefcc5c027a6959d3f4b124ddc54f916f6c81c47b34862c85706019ab869ec9ff88b329b534f4948c51e445d40d82bec0894653460bfbcc81733e1c",
    "signer": "0xbeDbeF70f005ED8b5C2c929aA1b0A4012a354701",
    "userId": "516619446"
  }
}