{
  "manageEntity": {
    "action": "Save",
    "entityId": "128566227",
    "entityType": "Track",
    "nonce": "0x43f12fef178f13e3a664b2f75fe5704cc777676780fee61be0429cafa8c64e24",
    "signature": "0x49c4b52fc26063f69aad2d55267cd2d076856961688dde3848f3195e82ccc4875ac2ce7709061a0c8b2e29052ca760d6c82d5b9a7bc084d4dbe40a531d16ef481b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}