{
  "manageEntity": {
    "action": "Save",
    "entityId": "867215",
    "entityType": "Track",
    "nonce": "0xf45e75c24fdfbd630108ed16bb309767fbc1701f1f4406a6acf21bfe9d869745",
    "signature": "0x1ff8059552dfb7ec94c3dea75c6c2ac319c775f1579831015d3c4213917eb3c4354d7d3af578c98c837775571ef66a3a1c8d8998b208e4f70f6c314b72b641e21c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}