{
  "manageEntity": {
    "action": "Save",
    "entityId": "1985672676",
    "entityType": "Track",
    "nonce": "0x6d12ea1c3c46a96ccc2e0f5f55ce0496721c6afedc1b90fd12bb8820d805e5b2",
    "signature": "0xac1453ad141d1ac16d593f1e365aeed41f76f9484a0bc69acb531ba9aad1893975a17c5d852d70b407332ddbbb72aca1ccef0c674dea949007c124e2576584a01c",
    "signer": "0x4089d1751487aA665C895419F2578a6Cf33BE481",
    "userId": "728155533"
  }
}