{
  "manageEntity": {
    "action": "Save",
    "entityId": "1666291164",
    "entityType": "Track",
    "nonce": "0x8dd04e3b3f3bbd86a8b9f0ecf3971ee89c05bbd68842f839deefb627c4aae00e",
    "signature": "0x46bd8fe243496e5228aee214dffb5cb5033bb62e3863ebbe5bfc5e23f8e037b952d738007f8c3fdeb5e21813c48f76f1fb0567e351e88012a21e3df500c289bd1b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}