{
  "manageEntity": {
    "action": "Save",
    "entityId": "1639798891",
    "entityType": "Track",
    "nonce": "0xad1e57db0fe614f0dccd25ec7db58032e7085d8665c397f281e982cacca189b0",
    "signature": "0x772f34c82d7742b156265e375bad5e51e7e71c79bd777c6fd8487b3c0096a7151fbfa79657b2df3d636837b89ce92f9cc094d5ed2b8e98f912bbae71cd32e0fb1b",
    "signer": "0x06Ad5789cE045C5B0AeB97849051a7385CA95B4a",
    "userId": "270209897"
  }
}