{
  "manageEntity": {
    "action": "Save",
    "entityId": "199141",
    "entityType": "Track",
    "nonce": "0x3813e86a5815ee5876ecde30375ded13f42d9bbe1124dbb9ea847002b45714c8",
    "signature": "0xf63b47b336d1ac6ccbb65006257fa135226dfa214036fb1eb27ecef4aded377c7445d1ff92c3e9541e4c1fef02a8444ed8ba7df9d1bab41b834437fa0b42771c1c",
    "signer": "0x9369ae91F6A1cC4996D9126FD991d64e7E24c805",
    "userId": "333763354"
  }
}