{
  "manageEntity": {
    "action": "Save",
    "entityId": "1490652260",
    "entityType": "Track",
    "nonce": "0x8ca6a85ce5f6babef08f9f39507881081d1974486304d3dacd499d86f3fbaf90",
    "signature": "0xa982ba96ca5599fc54364c3c4775d1dde3f5406145c16c6fef210600e2ecf19745eef9f7bb690b33c93a1f061a89743dd4756a7f2caa7aff24292b25a7817b6c1b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}