{
  "manageEntity": {
    "action": "Save",
    "entityId": "316660",
    "entityType": "Track",
    "nonce": "0x193f4a12bb734b3bbeb8ce8b6f81934d0d1635485a2590a0558acba2fb486fee",
    "signature": "0x7b9ceaed7879a2fa39de97dedfe182169becc63553db743feb4762825ec3790f625d3e7887e7d6833ddf1b26074f0fa4b46478588e3d4ba7dcfc093bb61ad4d51b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}