{
  "manageEntity": {
    "action": "Save",
    "entityId": "1121896977",
    "entityType": "Track",
    "nonce": "0xf658382a3e8c523fe05d4aea19f397c53a242185f68e72c7851333cfa1bfff09",
    "signature": "0x0ce7f9c68080934e89dd0e31063c6933fd1c8d8e05a2ba4811058fcd76e0147d35a427ffcf4ea5ddf79c85407d969797643d908680eed9c737e2201f41d8d6851b",
    "signer": "0x9668338741f0B2F3bcc87715a755f7FFACcEd1D6",
    "userId": "945181225"
  }
}