{
  "manageEntity": {
    "action": "Save",
    "entityId": "2004955952",
    "entityType": "Track",
    "nonce": "0x4668028b9cc1a5a53259a2a924908e9a6679fc7e5940e68438f96633908c1217",
    "signature": "0x34aa5bac677fc11421bd0eb4f55a3dcf714578355b8bbbe9426f1ef122d7af8b5d571507fa1c29c8fd1a3dc53915477a3920304e427478f8397f097c85d118ed1c",
    "signer": "0x88ad765B72fb060B3adbae1FA44A6C64722E1781",
    "userId": "236177"
  }
}