{
  "manageEntity": {
    "action": "Save",
    "entityId": "295507465",
    "entityType": "Track",
    "nonce": "0x2ab25b55524c8c83c7c1299f647c45d13a9dca0de3d587d0b5ad298878de27ef",
    "signature": "0x4678a83c97752b1f41c718ebfa2d0f8246e74ff122ce10000642598427e118ee642a06cacf4dea73aad58e5ed03e8ef98c0c8069cb3fe176ff2cb6d77aaa248e1c",
    "signer": "0x2F7db4C1AE3922aD0f32CEdED1870278dd17b64b",
    "userId": "467213409"
  }
}