{
  "manageEntity": {
    "action": "Save",
    "entityId": "1760206493",
    "entityType": "Track",
    "nonce": "0xd5095c86ed3d6a21cc8b9f8c6606c8c0c6e917892f6efb9f6ecccc2026c0d9b4",
    "signature": "0xf7d8c8a9780a5dc8f1707874e89f070f06fd94112902385bd2cf97d5c190dbcf597ea4618819982c962700e9786cff82f4a5f8e300f4e84b1dc1e1a557cd7b281b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}