{
  "manageEntity": {
    "action": "Save",
    "entityId": "12009",
    "entityType": "Track",
    "nonce": "0x42eda9cc3a96903cff264fc7616b85d3fe1f6b45196c672900b37a834f32612b",
    "signature": "0xb433ba72edba51c20e79b8e394d1ab43d1c8949e949a4d0674204adc5e7699c735d67db0936dd51efbb9ad669d492a7036464e18a73c0b9d63fa0d0a287aeaaa1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}