{
  "manageEntity": {
    "action": "Save",
    "entityId": "1468123115",
    "entityType": "Track",
    "nonce": "0xfa9c5e2df4b7ab3221dea719b511a34ea0543a49cd85d4f3db310fc4b1270e2d",
    "signature": "0xcb4c2e18d6e14122b996a4068c30118598fb0d317bdba8fecdf317359f3867360e74948c789c8192141eb7144c3abe6f95fe740f828dc9104223ce5cc3fbf8ed1c",
    "signer": "0x06Ad5789cE045C5B0AeB97849051a7385CA95B4a",
    "userId": "270209897"
  }
}