{
  "manageEntity": {
    "action": "Save",
    "entityId": "842492156",
    "entityType": "Track",
    "nonce": "0x79b139ac0371e5d79625608572a4966649e2448e9e05d00ff7977d09ca8c9a44",
    "signature": "0x6fba6d6d514c60d053a654c9d14dbaab7108ca067188724f7eba77bd328bb59b7f8dcafebd5a94673cc68f81e20fc36f9eb5f35af0649609e776e03d80a8acd11b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}