{
  "manageEntity": {
    "action": "Save",
    "entityId": "1906495768",
    "entityType": "Track",
    "nonce": "0x5a9ea6968e295c95cf174ccb23b44ecd039d8e2c4858271d6e5bbfe416c7ede1",
    "signature": "0x7750f8b0d051be711d34d8e309cebfb256b84c79d44a09c5ea765ec0b76613684ccef2039809621aa5f7e61a5187902e898103e1c001ec3c7c64e41aa1ad47ff1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}