{
  "manageEntity": {
    "action": "Save",
    "entityId": "260738988",
    "entityType": "Track",
    "nonce": "0xfe08caa5aba99e2a3f291468614b052d7e73610cd8e5033352385213c11a870f",
    "signature": "0xa3b1f45145bc7622b5eb2d06eae1f8516710394d28a27626b620cbf9fe9ea5b8158fd918802b4c4f3d06b4df7ef9f0c80dc230fe08241bc6d37adc7bbc8009a11c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}