{
  "manageEntity": {
    "action": "Save",
    "entityId": "1038370094",
    "entityType": "Track",
    "nonce": "0x8f0849c2305e90a586f00f9bcc15470fb957a06998a40e13f29a33ea2bcb51c2",
    "signature": "0x974c58c70bbfcf7be9975f21353228c72af3499b07d727a133d202baa43d05db2f1a561c97fbf63e38fd6c538acb956b9cbefa969e39fe5181bcc2b52bbb9df41b",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}