{
  "manageEntity": {
    "action": "Save",
    "entityId": "445040",
    "entityType": "Track",
    "nonce": "0xf19c6f444b9a5e5fae6bcdac3a0fbe7581a93e886dd51c0e8de8234b9dc0fee5",
    "signature": "0xf5a9cb3f4283116e3cb7d0b46b68d5824c7737947de60b94473b21b55567eff13071c1cd808ba4e0de2ed11cd89bf4ff6f532638c566fe2929a23b245118f32d1b",
    "signer": "0x036B1ee0d2003ae5B5E252d58647d13f0e588EEB",
    "userId": "161353174"
  }
}