{
  "manageEntity": {
    "action": "Save",
    "entityId": "357904080",
    "entityType": "Track",
    "nonce": "0x0a4a2a603af39a8147fe297e3ca08ca8141c113ef9555c5f13c67a993edd2bcc",
    "signature": "0xae619785026a23503ee743cff4d0d7d82b8a8cf5bfdde9ea0770889bd72740275aeb192bd8d78ebc6206d30fb05bf076bb19055ceaff8d05c0f0a471e648de091b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}