{
  "manageEntity": {
    "action": "Save",
    "entityId": "1928975016",
    "entityType": "Track",
    "nonce": "0x384d6768cd6495ed59285a0c581f95e745022fd4c3f001d6ec7d1f484291c534",
    "signature": "0x04bcc49ac2f5a7bdd1ebf9d0cf8036e6a58e3e8aef414649b7289026caba34d730e260ba95757bac8fdd5e3c16ddba5da5dae963b1b6b28d9f7f4e7d2b7bd9a21c",
    "signer": "0x59765b22C96E88dA578af23E8611d6ca2dcCd7C9",
    "userId": "377610060"
  }
}