{
  "manageEntity": {
    "action": "Save",
    "entityId": "1352506965",
    "entityType": "Track",
    "nonce": "0x722c6df789464ecfe23edaa3b62b48ffcb7d7a73ea0f22ac3875a338f4cf93f8",
    "signature": "0xa1ee56e232157c293839a55e13e3bb3a110839742225c4f6cc9898ef498d54b108937ac7d6da3a48a26d72405bb583f60e9eeb98f9ce907aa854561033eb41e51b",
    "signer": "0x4a32dde6757c86F147e3C1Af86284568E19D14f6",
    "userId": "985727"
  }
}