{
  "manageEntity": {
    "action": "Save",
    "entityId": "2049555726",
    "entityType": "Track",
    "nonce": "0xe6a322b63e6fd471f0ece4ee5dba5dd66024a41fe6e72be104adad99570a7560",
    "signature": "0x2f97aa60bb8f6bd0a11d64c582b8f3f2b5c07c61a417a09ad439235bdf0bca3370482cb30b82fa480ba2dd6e8e84be754ade7d39d5fca98e3684c568a43e13321b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}