{
  "manageEntity": {
    "action": "Save",
    "entityId": "1438013733",
    "entityType": "Track",
    "nonce": "0x9b39c0737b1e10a5f7079b975cfea86bb91b1b8c1ef8d4ab3f7e640447ab1faf",
    "signature": "0xcfc84a4ff3467b4aacbebed3a424e7ffd8f90b4b3c8a216f3a0411e7f4a8fb6f3d4517d0f5a7ef77868bb987d8cb14cfcca6ea969217ec045f2f298a4f42b5a51b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}