{
  "manageEntity": {
    "action": "Save",
    "entityId": "591026767",
    "entityType": "Track",
    "nonce": "0x2a83257c07de16244a50c48e21b7a80c2e090daf53338de88b7548191a92f69e",
    "signature": "0x0f193c06c1e4632c2d912d580be6ee3f18bdba5dc09110645b36dbd3c9eef8bb7dbedda4b8bb2a9f70f35f040c0c22d1fe05881f5a3f71b4fe1003691cfdc95b1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}