{
  "manageEntity": {
    "action": "Save",
    "entityId": "365097310",
    "entityType": "Track",
    "nonce": "0x935810f4b50810e7d3e5623f2659a25f8fce07aeac7a7f1d9ae37ac297c70b3c",
    "signature": "0x0fffffc52ccc9d4cc26cef7320569b845e609b61ee541fa0db40ba486bf247711bd7f668e35ab809ff36bfd6507677b2b19923e910914db318e14e67532d39e61c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}