{
  "manageEntity": {
    "action": "Save",
    "entityId": "962653",
    "entityType": "Track",
    "nonce": "0xee9522c9f0e608f0ccd974e9ce1a5a594fc827aeecdde1e753fb1d638441730b",
    "signature": "0xd92d117d4bebf20530f07e43d0604a382eb08fad4fee0fdaaaec21793c1185db612f8a111c421d53eb9cce963759faba981e6991549ad1c107901c4a40a351631c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}