{
  "manageEntity": {
    "action": "Save",
    "entityId": "104555",
    "entityType": "Track",
    "nonce": "0xac5856e8f54850921414f04abc7b38f89c25e1d36d6672c676484ac1f65c1ae9",
    "signature": "0x147a39548dbe155f13fc26c7cdacfa4740474ecb097ed4ec8784944b7794552928b740c36fc7ffa1bd66a4df36496ee97fae3bb0aff3587e7945f227cda0b5eb1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}