{
  "manageEntity": {
    "action": "Save",
    "entityId": "1895485827",
    "entityType": "Track",
    "nonce": "0xb65644ad27f3248b448107c8557d26e1d591ae27390b86e937624c7361974071",
    "signature": "0xa8902d90fdf286e21ac18a9405f34484916358fcb7caa5c798d42f5c522f88115beb4ab12933fd26065da524983c734e963c8663788c6c5ee63090b4124d12c91b",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}