{
  "manageEntity": {
    "action": "Save",
    "entityId": "1219619843",
    "entityType": "Track",
    "nonce": "0xa866d7e039fa928bd200bb024bdd9742cc53b953a0f2de16dd44cc59caa186f8",
    "signature": "0xf65980fceb220d8d80298c0d203c268c5419e5d3fcffa367689e64a065c2a3ba27aac983b461e9f220cbe54ab01e9d2e478c95ad56d308a6fce5fc3120fde4ab1b",
    "signer": "0x06Ad5789cE045C5B0AeB97849051a7385CA95B4a",
    "userId": "270209897"
  }
}