{
  "manageEntity": {
    "action": "Save",
    "entityId": "1461300289",
    "entityType": "Track",
    "nonce": "0xcc85ce6c8986c2165a8d7f7c682c41c054503b5a68e884a9f53b26ce8ad2500e",
    "signature": "0xaa43ace24164098dcabb4dfbca18f22bb32ef20452fdda3bc63a4685dd46b4e735c6d9433c8a5fb8f26f2fb9bfa25f984c8019d5285e09548e87ba4656ba08f51c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}