{
  "manageEntity": {
    "action": "Save",
    "entityId": "854762",
    "entityType": "Track",
    "nonce": "0xb2255fe61cd541ec7adcfe4f295564f91bec218e77451aeb7b8fc7bc904ebac6",
    "signature": "0x85fe4063a0aa9275a1d6a0a5536f19f231d0e7958e219d629fb574d971b07fdf4cc5f318d973f69f8d39a4b61f0c88999eae78db9876042e98e798d6827128061c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}