{
  "manageEntity": {
    "action": "Save",
    "entityId": "1527268908",
    "entityType": "Track",
    "nonce": "0xf21d6cde50c59d360fe4ffe7fc0e960dbd2fed5cea8d7143bd5438ad33f5776e",
    "signature": "0xce6ac6a0d67f9d5a40e431f380cb1d53f8e7d3475f5686a35252bcb4c64b0bb4523591b10000360c4a183a8d916c97cd347db8e08bb267416c9611b891f7c1551b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}