{
  "manageEntity": {
    "action": "Save",
    "entityId": "963812",
    "entityType": "Track",
    "nonce": "0x09d4e2516662c067226acaf16fc0563768ef4642a258cb6ca77626b6e2fb01ab",
    "signature": "0xac5c7746e505fae7499d53e578b2ae9e066557182d03934005e8ad7a8d4b8b355d6c8ec176c34282e1f3a86581d9aac2bbde493754b46e323241ec8d587fc4061c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}