{
  "manageEntity": {
    "action": "Save",
    "entityId": "1920836444",
    "entityType": "Track",
    "nonce": "0xf308dda8f716115a1621d84fde6779bbae5a358a8d325fe34ad0a0870fcf0ec2",
    "signature": "0x9bd43bace59ac4ec7dc2c0630160b5160fb17df7fd68079ec6aaff841d1bf5876ed0cf5be895171bb26c5b232fccda080bde6fb3422faaaba85e8b49dbce80821b",
    "signer": "0x8FF85C5AA450a88f13FbD5170e24E2a3eFF32518",
    "userId": "311829956"
  }
}