{
  "manageEntity": {
    "action": "Save",
    "entityId": "1468732790",
    "entityType": "Track",
    "nonce": "0xf6f62ff9fd497b2f1beb50a88df60b5973845a2dc3b3db6108e201d7dcd0e1ce",
    "signature": "0xc5cb459bdc2542b236e9515d3261e7d1af70e2a8b1a7ece14a6efc9aea848bdf69ac86a9e45df98c41b086497548bf8b2f55d28f27f81dbeebd30f26265b4b231b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}