{
  "manageEntity": {
    "action": "Save",
    "entityId": "1468907050",
    "entityType": "Track",
    "nonce": "0xf8f66dc93bb06e749e0649742c04e979439e8c214c5342581ed748a2bdd66495",
    "signature": "0x4c2d3da2fafeeef5a8b6489d201dc185a329894a04b2546795c477ecf42462f97155cbff86498338be9d126561786f1e669714d8940dd3bf58c0aca0148a702d1b",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}