{
  "manageEntity": {
    "action": "Save",
    "entityId": "1662435937",
    "entityType": "Track",
    "nonce": "0xa80e5817b6732440a6eacaa0fff2e2e738bd3367487cbd58c5ccc044c9f0f1cf",
    "signature": "0x0d58d327775003de3b12dec32e5441c07528148ba7370fd39820babca5b6554a3f3319d4413850eca6c720c4639e324cf30ff80d4635b5b41d6606fff95ab3881b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}