{
  "manageEntity": {
    "action": "Save",
    "entityId": "378102",
    "entityType": "Track",
    "nonce": "0xeccac086ee32dd0a71410267019d72a9745ac5e53242ceeba1e27267d88fed02",
    "signature": "0xd0b1700d1c1f1b4aa15466849c6ec5ea1949f89d98c8c444a22757fb22ee39bf66d4606af7d05922495870dda12a11c70e4316fa64ee7cd51947979c0777216d1b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}