{
  "manageEntity": {
    "action": "Save",
    "entityId": "416357535",
    "entityType": "Track",
    "nonce": "0x7dcf22a13a6cf585e26b72349291927c719b0d78ec2d526ee8fe2d485352e073",
    "signature": "0x8cd2d6d062629ecbc2681f919294b465bd3d7494366a9920a36b7e32e8a4918e006f696725c5da411b75b4698d24c68ea3a4695c7a6ef73b076f2436997b5bbf1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}