{
  "manageEntity": {
    "action": "Save",
    "entityId": "77956233",
    "entityType": "Track",
    "nonce": "0x1b44b346c177ac2e407a395ff12cef7ae00e4b7124de2fe373edbb8ff79c8340",
    "signature": "0x0413e121ba8ff55aaff2e8e909845106bc70b8618349dee20efe818275ec8cee6ca6213938102e3ace9a47ce477d5f5040e6ecf051eb233428471319277885061c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}