{
  "manageEntity": {
    "action": "Save",
    "entityId": "252578",
    "entityType": "Track",
    "nonce": "0xa2bdc8c010f3af8f1690ca9db74b3941dde0a7266e783ba0d8d32b59deac7aad",
    "signature": "0x16ccf6d81eb2077b76275f002b71ebbc0ff3239842de43c89f04970dd7620b8063335795c304d7d9988e3962d3e450d890676d09831928788bc0c2db781762351c",
    "signer": "0x59765b22C96E88dA578af23E8611d6ca2dcCd7C9",
    "userId": "377610060"
  }
}