{
  "manageEntity": {
    "action": "Save",
    "entityId": "1508796909",
    "entityType": "Track",
    "nonce": "0x4fe500c5fe65cfbdc7b47ce81784dc9f456c378e26b85d1ecdcdc9f887cd3c9e",
    "signature": "0x6b9b5312102ecff11c31689866beeb2437f430a4df59a54b9725316376330b653620c7ee5661f05b37f83d1e19fb7c9515aa307e55680ce4d303a95e6a395b6a1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}