{
  "manageEntity": {
    "action": "Save",
    "entityId": "1920425632",
    "entityType": "Track",
    "nonce": "0x193c89a047869129e2757b1e2c90cb8bd0f7e87598e8653d12e05555516e7998",
    "signature": "0xbe6ad063c658610ea41969a5cc9840792d5b80c97e2f8b77089701d2c91bb160664a3dcd6776aa489c6ac49a2b939a42530f4a1def6e18ebaaa5c4c92992ddd11c",
    "signer": "0xcdc1772589e70ee6667FAaC93E3F0CcD5BFDa2aE",
    "userId": "354908"
  }
}