{
  "manageEntity": {
    "action": "Save",
    "entityId": "795153778",
    "entityType": "Track",
    "nonce": "0xed7d219cca6ae62d6421704e71ba5c0272962fbf35b01dfd6b8b3809e186c9b1",
    "signature": "0xcf791c3bcd7a1e0ef0ecd90a18dda2e2c18377be39961c818ea6c0905484cce1454732bf7eb788813a02e16ff55c0dd414c4c8023c8c0b728df7ced1030f8e6a1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}