{
  "manageEntity": {
    "action": "Save",
    "entityId": "250393877",
    "entityType": "Track",
    "nonce": "0x65a93e755e6400d01752a7256d36dc0f3a8ce142385e905489c6c7cab4df0222",
    "signature": "0x25332eaf09f14c05e9facb3134d1ff0a348ea4361baad84aa8c3c43d00dcd11d3dee1653f55462da9144d1960ea3f873c73cde76583860f4321ba27d0592867d1b",
    "signer": "0xD24F8A2501472e4c9FD5dfCCDF80B550912c7FB0",
    "userId": "887242445"
  }
}