{
  "manageEntity": {
    "action": "Save",
    "entityId": "32577",
    "entityType": "Track",
    "nonce": "0x7de66da209f4902481308601615bc47ccb801df8687ece74f04ad8e2757b20c5",
    "signature": "0xccb4f07e0207701f80a48676a32c5cde3e144ee56d482c794d62ce6433af516e75225acce55cbd587308838893a1bdc0056a246539ea59f71ec3ecfb5b3bb2271b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}