{
  "manageEntity": {
    "action": "Save",
    "entityId": "1662740733",
    "entityType": "Track",
    "nonce": "0x97d4c230c0b347f88fe0fd4705273c67ac8ac446565127bc16e201b087ab392b",
    "signature": "0x3c46164962f180d1306123ec511d280d2ba1880604c1c378a08a8393a7fa1e724ff0465cf4f8789beda65eaed369a26b875d6554aadc601db0d71388ddde835a1c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}