{
  "manageEntity": {
    "action": "Save",
    "entityId": "1687734501",
    "entityType": "Track",
    "nonce": "0x62c01edef0f38497fa2e0bf534d75f680b96ca11173c846fdc4666121ef67e96",
    "signature": "0x117e1e1ab202a36a25ab18566e5f7b2510b7e76f3a1a9ed596053fe2f95c64b36fd82e822c8e4c1339334fcf90cec1617dc17c1f99a36c461a19f35673c036cc1b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}