{
  "manageEntity": {
    "action": "Save",
    "entityId": "369226",
    "entityType": "Track",
    "nonce": "0xbf87f94fb5584d8d65f5f521cf3d27ab9fb6803c36493b985853b189e3919435",
    "signature": "0xd0539d243646c4be9196e131eab8ca8c95f8738c9388fcd93ab7408331ea5b9155a54205755c53474e6b275e361380c3d244811dc4d7315546f8c93c26a2e7411b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}