{
  "manageEntity": {
    "action": "Save",
    "entityId": "688577066",
    "entityType": "Track",
    "nonce": "0xe54ba7b196d46df150d1d79c7cbe68e94932336b9f81ba2439193cd2dfc4ffd4",
    "signature": "0x63866df82e883bed19232d9cb7d6d2ba7a51c1c5a81984cd950f37324cad94bd3188cc50745274578483a9d2460b6ecd29ae73df6a257cac421a33e7d5391b9b1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}