{
  "manageEntity": {
    "action": "Save",
    "entityId": "1494143338",
    "entityType": "Track",
    "nonce": "0x33e9077963d95477fb515830d0e57fb4cec0e0d81968471a7a5709aaaf0dad34",
    "signature": "0x175528ef45a950d95fa142806fbd1a4a79d4d320c5793a79d5845936373f33a20a335abce81e89832e88ba1a7fc1ff3c88f944ccf2072f7f59b07c0f2cdb23751c",
    "signer": "0x4fdc03E53311BF6b1B8728dd0Ae0630bF74176f1",
    "userId": "162770660"
  }
}