{
  "manageEntity": {
    "action": "Save",
    "entityId": "978146",
    "entityType": "Track",
    "nonce": "0x5d9b7ecb324e544dd4a5fdf66fa6f86793d4618839f0557db0e1f64c41d620be",
    "signature": "0xe9f9d7aed5c4e4fd0fc2c37ce572424323764a181b8eb6e9c79a1ef41bf9767d7a7e13aa5a9b84a3c33abd696d14c679376b51bbf645358624281ae629c4ab8c1b",
    "signer": "0x53d8e61f7BdCd69E26B5AAe8F197464091224DB4",
    "userId": "99786"
  }
}