{
  "manageEntity": {
    "action": "Save",
    "entityId": "940009349",
    "entityType": "Track",
    "nonce": "0x3cf411e1c043de84d9e0170e5ee4b1a7da184c1fa0bec1eb66e9add03e7cfe6d",
    "signature": "0xca6d0533c5ce657cfa3371b462b7f8f15295b14d5a2452e296736265aea60b01427cdb2f677c319ecaf6b3c3b2b205834829ecb9afb6eb9f0f2895b03ecdc0121b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}