{
  "manageEntity": {
    "action": "Save",
    "entityId": "1623478666",
    "entityType": "Track",
    "nonce": "0x7e6ee6e35c1a8f1b83deaf3a81a752288a9fae5412615cb4757900ff7bd2d99c",
    "signature": "0x7332524e9c0759c25b59e0791e30736e4521c5aeee2028b13d8af812675d86d63c5afac35ad238a43682d90611a428c69fc1f6da245475c12e5114a4a5ed35a81c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}