{
  "manageEntity": {
    "action": "Save",
    "entityId": "2127450025",
    "entityType": "Track",
    "nonce": "0x30d7988fd315ee5887d4a96c7ad685a00d90c06df8473771a06d0c9a4594c329",
    "signature": "0xd1df93596e98d62b7517cf78acc8849c6a7e33417fbabac1c24aabcdecd5eca74f8eab38ed101fc2de255330af3d42e47a96292a1082cb06b22966f51228781b1b",
    "signer": "0x7e1F8Ad5AC71ff7ECFaaB54D7C2Ca8C373DeD528",
    "userId": "674981811"
  }
}