{
  "manageEntity": {
    "action": "Save",
    "entityId": "1267458499",
    "entityType": "Track",
    "nonce": "0x710da06cd50330bdf3fc62fded999011030a98195b9fa58fc55ce6dd815d2f0c",
    "signature": "0x8b6432e32e9ec197d41f65535ce7c33efb9a96a1e09d26c2110bbc09dd081b2a4c1882bb25d7ea609784c4f5abd47aabf3276820921a9dd2de407a7117c4c1701b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}