{
  "manageEntity": {
    "action": "Save",
    "entityId": "1766621544",
    "entityType": "Track",
    "nonce": "0xbf061277434054ba7667facfba85a4d741c68466bb8dd52df165de992ecec22f",
    "signature": "0xa223a233aaa0418363d5465493bb310ab7ff39b9c900802425bbadb8e0268e1b0409c8ad86268bd980ac0399c31f3a664aaa1e871e515d47a5ded4fbe359b08e1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}