{
  "manageEntity": {
    "action": "Save",
    "entityId": "1296364650",
    "entityType": "Track",
    "nonce": "0x80cd974a36aeb8cc70574886b0c9307e0bb7d09eed54f646d21e44475c5e0d9b",
    "signature": "0x89ea2ad13be487591b244ea7cb93d9976e7ed6983db933e40d311d0edf06089b2cc70cb7fc189001d3e321b82967d97625af3cc683b9852db8bb4c30e35541141c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}