{
  "manageEntity": {
    "action": "Save",
    "entityId": "1047638",
    "entityType": "Track",
    "nonce": "0x547b97114f0c761b029d06c852ad2bacecb1ff4c077868f71f47e1448f1fc792",
    "signature": "0x513c63a4d4264b6812249aa8dfb53de411184dc9bcba3fc8c6a9e7259252353f0774ce1aa3fab0347a4ed1595204c1f167a59f8d45cd6bb41853dae185d229891c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}