{
  "manageEntity": {
    "action": "Save",
    "entityId": "540179",
    "entityType": "Track",
    "nonce": "0x4ad3fe6a527022e5cf7b2f37179ed4c1ccff4604df252b694cc585e8f5a9489d",
    "signature": "0xecdeca80d670fbbd31a1ab0f0fc619062eb67fa8189ef6daeda2cc05e9e774123dbea17738df02bb6489b5e2858782f3229579245549f0b1d902bef9603d96f21c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}