{
  "manageEntity": {
    "action": "Save",
    "entityId": "1400978948",
    "entityType": "Track",
    "nonce": "0x62de53d9e368bf214050c95d5bd102d0b6ea722ed1dddf1b05c7c37037699d10",
    "signature": "0x534944d8f881295f88d655cdb865bd5dfc21f4069914a829bff887261dc88c1561704e754c5a58d6ffae33f48285f89c0b51c25028da89451b12568c3d4c78011c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}