{
  "manageEntity": {
    "action": "Save",
    "entityId": "1570724027",
    "entityType": "Track",
    "nonce": "0x4b0832681abd065aa14d77bca58e2aef07e834e6fd1ae648644b3f39e5367116",
    "signature": "0xe7789e186148de6c110940018800d9f2fb1903eaa29484d5de6ea831e751b1d965b8c1ec764fba3e96f66009e3ec2879da847ef92dbd734460d0ac468a57dd221b",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}