{
  "manageEntity": {
    "action": "Save",
    "entityId": "1514875496",
    "entityType": "Track",
    "nonce": "0x3b26ba5b0c9f130744cf122dd02a0d5a6119fc32dcef76368fe1115583891b95",
    "signature": "0xe8fbff01a8469435cf6ad60b122bb7bb68cdb0c1cf0e176d1397034464bf202b5987479105e0ece2a9b5383fd195f3a321c061931a7fe9070c235bb12d6598331b",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}