{
  "manageEntity": {
    "action": "Save",
    "entityId": "1489681184",
    "entityType": "Track",
    "nonce": "0x6187bc39733804f6562dfa571d0775201ecec5369c3565132227caab718bf99f",
    "signature": "0x101f50e9e884c32f122dd979e79feb0afb5dd296ba0af3ab55abfa993b41d8db3bda05ab3616ad03cd06ccaf32cdd4a7cce14ac6247674d1aa42de39366c893f1c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}