{
  "manageEntity": {
    "action": "Save",
    "entityId": "2140560562",
    "entityType": "Track",
    "nonce": "0xb08c4e2308f02beb9a7d3539e92484195fb580790f912bb0d5c79a9ecf66abae",
    "signature": "0x018935ebee302d136ed53c1eb5b022c1e50088b377bdac650744a8f5796523a83db6e319c7f4b060efb62ad6f42bdb3e36fde47a5fe7ea1eb573d0a3c21ff94f1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}