{
  "manageEntity": {
    "action": "Save",
    "entityId": "93125722",
    "entityType": "Track",
    "nonce": "0xa38959605fcbf162eac276aee323bac8afb4ecb9beeb60c49ae51410d8cc66c7",
    "signature": "0xb8d02171fcdaec671374224ce64051146f6e3c815d443d954c870afb9fff6ba563d2fccc4f19feee79375e679a34661dfae224c1c061f81f2ae98dd8aa60a4791b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}