{
  "manageEntity": {
    "action": "Save",
    "entityId": "1810166120",
    "entityType": "Track",
    "nonce": "0x31ca6806aa556861ecf8f3a2728ee2a64b1f616b635edcf8fc5d3e51e145527e",
    "signature": "0x8cdb63b1e743d68ec133e4546543a9c3da51b540e3435d3797446886d948b373158c588c1a41b44533c733b4afda98a8b49d5439bf3c408802239c4706e51c251c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}