{
  "manageEntity": {
    "action": "Save",
    "entityId": "992492330",
    "entityType": "Track",
    "nonce": "0x1cca35b4f6c7de9d69991edc0d761052b9aabee53df1f76c7d7bbc9097281868",
    "signature": "0xacafde19cbb626cb77742a7f396f8705df645fa723a3f89d7bb130fd7cd289d86030f8a1f3dd5bd209cd80c0c401e11732105cb1cdaf73c1dcc968e5e9f14c451c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}