{
  "manageEntity": {
    "action": "Save",
    "entityId": "1380302939",
    "entityType": "Track",
    "nonce": "0x1190be125723dd0dab7b06739e6109d73383726ac094f2efeed13a92f40d1e0e",
    "signature": "0xb7969cd94e6b52684ae660c7f967846e89c326b3c8116ad9743d760284249da8620079125aa32fc99c318c5d77aba3e85a900dff8eb86dd4d04645755dbc2a1b1c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}