{
  "manageEntity": {
    "action": "Save",
    "entityId": "56115814",
    "entityType": "Track",
    "nonce": "0x5b0590077a2b36682d8533a829faaabe3b3900ffd16ab70aaac91f4497308846",
    "signature": "0x888be6522f0f824300ab69a0c52a76d1e626bc0c3b52158bba3103c4e8c962231559056ccbb35f3188e7480ae6e0ff643371812df8880bd81aea39bcfa915c141c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}