{
  "manageEntity": {
    "action": "Save",
    "entityId": "1063455254",
    "entityType": "Track",
    "nonce": "0x2e492031a0a6d43f1d3968731a54c608e41a742c09d2b55180f53a5c6c9c16eb",
    "signature": "0xd431f20814d7176accbdbc042644df7773c1ef4ba8ed0ca7f0196d0efb1107fa7815b71ae64fcdad93842d15d2deb39ba5b877d969cc0029f27e6e629d3e99cd1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}