{
  "manageEntity": {
    "action": "Save",
    "entityId": "1740013958",
    "entityType": "Track",
    "nonce": "0xb7208c11cde076d4d4f7ed20713357975d3d7663e02abac5934169809939c8fa",
    "signature": "0xd1dc938d2cf955917f8165afdf86e9f07a8665e715111143651bdf612fab97290b346f7318bf1131e73671b1809f4b73c9e646b8500c92ef8450c42688d059ba1c",
    "signer": "0x4dafC3e774A1033C5604372f17ccBDcE545f478D",
    "userId": "889450527"
  }
}