{
  "manageEntity": {
    "action": "Save",
    "entityId": "1520943304",
    "entityType": "Track",
    "nonce": "0xac8ae261afb9ec322b0bc22d7fb56df968c7b07f4229e6300c4a1b5f3cb08a0c",
    "signature": "0xe097d16ce842e8bdbd3fbdd6b297991714f235b07873f625ef8d5f08f32a71696ad68204817fab030abf7d2c17f22d565113cf005ab59695536f4601434107701b",
    "signer": "0x6AAB6EaEa3f7F15750b649C269b0391dcB19dEeb",
    "userId": "92019297"
  }
}