{
  "manageEntity": {
    "action": "Save",
    "entityId": "1479229532",
    "entityType": "Track",
    "nonce": "0x689f676c7e36ba24568e1e14a1ed889ac8d7db32dc563e2fcb173e78115b581e",
    "signature": "0xee129c204f3e736cb4dcc61097ba8c330a2c527e8af91c6bd69c5ed73a9fb0d55b4d7845bc0fad3912e40ecd13092c246d310ea51ffc344cc2d945ee969b801f1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}