{
  "manageEntity": {
    "action": "Save",
    "entityId": "1279519306",
    "entityType": "Track",
    "nonce": "0x1ece8d4e0fe95426db724a112a6f9e494fcf927f308adc76faee8ff8105f8eeb",
    "signature": "0xb689cb69f9b1f5f13dd629c11a4f8f0a5c5c017a42e6cdf5799abddb95ad45ad640872fcd1eacb201cea6eaa569ab76f3afdae1e435c03ef544194ab38d2eb311b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}