{
  "manageEntity": {
    "action": "Save",
    "entityId": "68943400",
    "entityType": "Track",
    "nonce": "0x02d5f7df4b9b922f41baa3d1007514b04fbd1c20883354091fe6c34309ebf2c4",
    "signature": "0xaa41c6f646d09d27f9ec8cf88efcf2ca083a31111eefbead0319fd5b8122b58f6db84192a28876cf40a7f5ccbc93ea2ea0a9277d835e0e516ca434e5db8965b91b",
    "signer": "0x040629E31a68119093b9a0111257C8449c2f8e10",
    "userId": "20"
  }
}