{
  "manageEntity": {
    "action": "Save",
    "entityId": "1047994",
    "entityType": "Track",
    "nonce": "0xf4a91756b68da2d767c1e7adc0fb3a62c376864711918e9833cfffb05a19edfc",
    "signature": "0xa8d8002895023e22362f4bcc0363d84dc8cc0b45fb1a5850a03e7feca50aed68115c9622b24e32314a7b6e793e87f2a07d07534a929b0d3957519c727a294d261c",
    "signer": "0x1F9dC682fadBAc94c0Dd4ca2232a3f490704a737",
    "userId": "737872723"
  }
}