{
  "manageEntity": {
    "action": "Save",
    "entityId": "2134748733",
    "entityType": "Track",
    "nonce": "0x179572e99f790e867cc53dfc0d70e0fb02903b9f629598ed0b10f963f593bb78",
    "signature": "0x45a223ad0b7942423a48f69ac9bcf524d1f6ce835bebd0e78420b1227672b933017fb2bd1ab3ce531f4ff29ad55319a88303c9593c9c3efb517dabd3bee023451c",
    "signer": "0x9d71fCCB64e7575736E44460e714Ce0fcd69cf08",
    "userId": "16198441"
  }
}