{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xa77fabf73061b71c48dc03fd4822e1526a293b85532b5e8befc4254991417ae9",
    "signature": "0xbea3e9e0a4bf0954e24f3ea2f23c7b3fb7b1feb761f945d66257fbe94512003527616e50c5be0cc4319af199bf73a45d6dfaf08dc103f86d4207f93ec2e2b8201c",
    "signer": "0x8bf63fF929862Bdfc338Fc6A74Ed7c6d2cB3a691",
    "userId": "927933138"
  }
}