{
  "manageEntity": {
    "action": "Save",
    "entityId": "49290406",
    "entityType": "Track",
    "nonce": "0xf3580cb4293e2c9a86b50b24a58eb612be0e25f67523815e5a16548268f8236e",
    "signature": "0xbe73724f0636d1b83afeb5313cd59810b22b04c82d37cf88022f0aa43e7580572b98e9eb9a20626ea2cc39d7873443aa4c96af5a10d64d817e98fa928e1aed491c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}