{
  "manageEntity": {
    "action": "Save",
    "entityId": "675805",
    "entityType": "Track",
    "nonce": "0xc95a111dea182042fa29b46b62ab4f56b173411bc2f8acbdbd316d8d7165b1d2",
    "signature": "0xdeac92944e7a1a32f92a437e08adbbe5e8b5dc82fdfefde1a4a876e8ada8f4d03466984a1d208d1ebd19c289ef9aec6e6eed92a6934071615afb1bff98e48d541c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}