{
  "manageEntity": {
    "action": "Save",
    "entityId": "90693394",
    "entityType": "Track",
    "nonce": "0xc8b2ba61362d30836c6d558020e8ac324861784a82a52dc0f8d0311fcb50e32d",
    "signature": "0xca04c6cb184c5e7dae92c049ed065dae37e6ec5611eb8ca7f09684a3904aa6ef74641c6b59e03cdb277ce18ba4d57856ca27aeb26a6cfd749cc708246c862b621b",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}