{
  "manageEntity": {
    "action": "Save",
    "entityId": "380863",
    "entityType": "Track",
    "nonce": "1790181399065727409",
    "signature": "0x3c902ba4eb0299caba5d0fa45862079097dce0d70bf6ad9953d7875046e0062f0b832087e18a946ba7f6f45d9ffd795ebc14a3649f117c01d30203aec9d0e4bc1b",
    "signer": "0x1007e09532BE90331E035838A9E2E0700bB9741a",
    "userId": "329513359"
  }
}