{
  "manageEntity": {
    "action": "Save",
    "entityId": "289324197",
    "entityType": "Track",
    "nonce": "0x77d98cb0cdaeaa080fd2e753a0d028a936d563f27ed183bdd19aa176f4f8e50e",
    "signature": "0xb5a0e410e90cfe7e40a85d91d9f93af7198ec6e6a2bb41cb41e4561549c70982140a9d1a945bd609ead895f54f9c2ed9fc9fc028ddb7693d61ea2e83a2f449e91b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}