{
  "manageEntity": {
    "action": "Save",
    "entityId": "1980251854",
    "entityType": "Track",
    "nonce": "0xb1a3cdaa32c0ee322c0dcf22390cfbbd9007c608cdb283ad97d0dfce14470228",
    "signature": "0xbf11ae543c7c1f742e1a958cb5cd4b6c5151e168e3aa14894b112b6f028b3ce67bd5474c61687e8065d9cffc4f0734ba4be578666a2ca78718fe48529a01c53d1b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}