{
  "manageEntity": {
    "action": "Save",
    "entityId": "117780",
    "entityType": "Track",
    "nonce": "0x380483c2ee89431b5774e9d2f69c6795b7bb9e63ab29b9756ac2ea61c6c6e4a2",
    "signature": "0x922ae66848f692e48fc48888d87f3560be6f359c795ea3c2dcdc045e5e1d29ad1fd94ebb8097591d150317c60520753d51b7c6acc584e987e52017e36ac9e4841b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}