{
  "manageEntity": {
    "action": "Save",
    "entityId": "719792757",
    "entityType": "Track",
    "nonce": "0x7a8e924d258d9864b4c08aecda481f6fff91cdc8f326b4899a09f809cc10ba79",
    "signature": "0xca079a1cd3b264ab949b9db3d605cede85598104bd2522771b57964c295bffa4562cbdf78b0dd4b462718e1b16162bc16b25f771cb9fbe98b6b5727ea2ef698c1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}