{
  "manageEntity": {
    "action": "Save",
    "entityId": "706571",
    "entityType": "Track",
    "nonce": "0x02aeecf1541450db9069677e445d66bd34d7ab72cd131cf14cd076b031e3593f",
    "signature": "0xd1d26b3d1218e2fe09e6b18e61461bcd09439b210255ada6529352ad321c446338ce5fe5177e140f327f7cf3f8260ebb66ce6bd80e5aef9d29c38e271ca4bf781b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}