{
  "manageEntity": {
    "action": "Save",
    "entityId": "1348813914",
    "entityType": "Track",
    "nonce": "0x90ba6bf47e45b2625f7e8cf54cad1d63f1324d8e381f8a08c5bb349007b947e4",
    "signature": "0x3093011080e605b8a41f22c9f200255576e4ebd9ac05b154f65657909880b00d714c7850474d1a372ce0f755b26887ea12fc5034c36e8063f0f561dfa754457a1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}