{
  "manageEntity": {
    "action": "Save",
    "entityId": "65025527",
    "entityType": "Track",
    "nonce": "0x8ad66e5b27ee0a0a4738b0a7a5fd05b15158e4aa25bb1a4de88f9a7101482e39",
    "signature": "0x23ac712e7a650cab1a810f3fa3257dc56e8fe9b32ab4d4245733b97d9e3d521c6b8bfaa971208ec923bff0fc510da2b485dea43862ee6f91054d39a750f8325b1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}